If fires occur at points uniformly chosen on (0, A), then [tex]a = \frac{A}{2}[/tex] is the second derivative where should the station be located so as to minimize the expected distance from the fire.
From the question, a fire station is to be located along a road of length A, A < ∞.
If fires occur at points uniformly chosen on (0, A), then we have to find where should the station be located so as to minimize the expected distance from the fire.
E∣X−a∣ = [tex]\int^{A}_{0}|x-a| \frac{1}{A} dx[/tex]
E∣X−a∣ = [tex]\int^{a}_{0}|a-x| \frac{1}{A} dx+\int^{A}_{a}|x-a| \frac{1}{A} dx[/tex]
Now integrating.
E∣X−a∣ = [tex]\frac{1}{A}\left(\frac{a^2}{2}+\frac{A^2}{2}-aA-\left(\frac{a^2}{2}-a^2\right)\right)[/tex]
E∣X−a∣ = [tex]\frac{a^2}{A}-a+\frac{A}{2}[/tex]
If we set the derivative to zero, we get [tex]\frac{2a}{A}-1=0[/tex], where [tex]a = \frac{A}{2}[/tex] is the derivative. One can look at the second derivative, which is always positive, to see if this is the minimizer.
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The complete question is:
A fire station is to be located along a road of length A, A < ∞. If fires occur at points uniformly chosen on (0, A), where should the station be located so as to minimize the expected distance from the fire? That is, choose a so as to minimize E[∣X−a∣] when X is uniformly distributed over (0, A).
Willow is driving on the freeway. She just passed mile marker 325. The fastest she will drive is 75 miles per hour, though, there is a bit of traffic that might slow her down a bit, but she doesn’t know exactly how much. The mile markers are increasing on her route.
The expression 325 + 2y represents what mile marker she’s at after 2 hours, depending on traffic. Which inequality describes the mile marker she would be at this point?
The inequality describes the mile marker she would be at this point is:
325 + 2y ≤ 475
Now, According to the question:
Mathematical expressions with inequalities are those in which the two sides are not equal. Contrary to equations, we compare two values in inequality. Less than (or less than or equal to), greater than (or greater than or equal to), or not equal to signs are used in place of the equal sign.
We have,
The fastest driving speed of Willow is 75 miles per hour,
There is a bit of traffic on her route that might slow her speed down,
So, the inequality which represents the speed of the willow is:
y ≤ 75
Hence, the inequality which represents the speed of the driving of willow is y ≤ 75.
Now, the expression 361 + 2y represents what mile marker he is at after 2 hours. We know that the fastest he will drive is 75, so we could replace y=75 in the last expression to know what mile marker he would be seeing at that point. This is:
325 + 2(75) => 325 + 150 = 475
Now, we know that the inequality would be:
325 + 2y ≤ 475
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A new Lexus sells for $56,000. Use 2 depreciation models and desmos to answer the following questions.
Model A: The car depreciates 12% per year.
Model B. Use straight line depreciation - the car has a value of $0 in 12 years.
Use desmos and attach a screenshot to show the following.
1. Use the wrench tool to label your x an y-values, change your x and y-value to appropriate numbers. Remember to lock the viewpoint.
2. Write on your screenshot and label the point where the linear model and the exponential model are equal.
3. Attach a screenshot to this ssignment.
Justgive me the equations
The time in years for which the values are the same is given as follows:
7.25 years.
How to obtain the models?A decaying exponential model is given as follows:
y = a(1 - r)^t.
For which:
a is the initial value.r is the decay rate, as a decimal.The parameters for this problem are given as follows:
a = 56000, r = 0.12.
Hence the exponential model is given as follows:
y = 56000(0.88)^x.
The linear model is given as follows:
y = b - mx.
In which:
b is the initial value.m is the yearly depreciation rate.The parameter values for this problem are given as follows:
b = 56000, m = 56000/12 = 4666.67.
Hence the linear model is:
y = 56000 - 4666.67.
The point of intersection of the two graphs is at a time of 7.25 years.
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Please help me <3 Thanks :)
Francine had six times the money Tommy had, but after Francine gave Tommy $33 to help him purchase a baseball cap, Tommy had twice as much as Francine. How much did they each start with?
For the relation of times of money , Francine and Tommy start with the amount of money equals to $18 and $3 respectively.
Let 'x' represents the amount of money with Francine .
And 'y' represents the amount of money with Tommy.
In the first condition:
x = 6y __(1)
To purchase baseball cap Francine gave $33 then the given relation is :
y - 33 = 2( x - 33 )
⇒ y - 33 = 2x - 66
⇒y = 2x -66 + 33
⇒ y = 2x -33 __(2)
Substitute the value of 'x' from (1) in (2) we get,
y = 2(6y) - 33
⇒y = 12y - 33
⇒ 12y - y = 33
⇒ 11y = 33
⇒ y = $3
⇒ x = 6(3)
⇒ x = $18
Therefore, the amount of money Francine and Tommy start with is equal to $18 and $3 respectively.
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Function A and Function B are linear functions
to get the slope of any straight line, we simply need two points off of it, let's use those two in the picture below for Function A.
[tex](\stackrel{x_1}{-8}~,~\stackrel{y_1}{-5})\qquad (\stackrel{x_2}{10}~,~\stackrel{y_2}{4}) \\\\\\ \stackrel{slope}{m}\implies \cfrac{\stackrel{\textit{\large rise}} {\stackrel{y_2}{4}-\stackrel{y1}{(-5)}}}{\underset{\textit{\large run}} {\underset{x_2}{10}-\underset{x_1}{(-8)}}} \implies \cfrac{4 +5}{10 +8} \implies \cfrac{ 9 }{ 18 } \implies \cfrac{1 }{ 2 }\impliedby \stackrel{\textit{slope of}}{A} \\\\[-0.35em] ~\dotfill[/tex]
[tex]y = \stackrel{\stackrel{m}{\downarrow }}{5}x-1\qquad \impliedby \begin{array}{|c|ll} \cline{1-1} slope-intercept~form\\ \cline{1-1} \\ y=\underset{y-intercept}{\stackrel{slope\qquad }{\stackrel{\downarrow }{m}x+\underset{\uparrow }{b}}} \\\\ \cline{1-1} \end{array}\qquad \stackrel{\textit{slope of}}{B} \\\\[-0.35em] ~\dotfill\\\\ ~\hfill {\Large \begin{array}{llll} \stackrel{A}{\cfrac{1}{2}} ~~ < ~~ \stackrel{B}{5} \end{array}}~\hfill[/tex]
7:21:35 in its simplest form
The smallest equivalent fraction of the number is considered to be its simplest form.The answer is 7/3 : 21/5 = 5 : 9.
What is what in its most basic form?Values should now be entire numbers.By removing the denominators, convert fractions to integers.
Since the denominators of our two fractions are different, we must identify the least common denominator and rewrite our fractions using the common denominator as necessary.
LCD(7/3, 21/5) = 15
Now we have:
7/3 : 21/5 = 35/15 : 63/15
Now that the denominators of our two fractions are similar, we may multiply them both by 15 to get rid of the denominators.
Then, we have:
7/3 : 21/5 = 35 : 63
With the highest common factor, attempt to further reduce the ratio (GCF).
GCF is 7 for 35 and 63.
Divide both terms by GCF 7, then:
35 ÷ 7 = 5
63 ÷ 7 = 9
By multiplying both components by the GCF = 7, it is possible to reduce the ratio 35: 63 to its simplest terms.
35 : 63 = 5 : 9
Therefore:
7/3 : 21/5 = 5 : 9
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the roof of a clock tower is a pentagon pyramid. each side of the base is 7ft long. the slant is 9. what is the area of the roof
The area of the roof is 157.5 .
It is given that the roof of a clock tower is a pentagonal pyramid.
Each side of the base is 7 ft long.
The slant height is 9 ft.
we know that, to find area we have,
Area=1/2 × 7 × 9 × 5
= 315/2
= 157.5
Hence, 157.5 square feet is the area of the roof.
Pentagonal pyramid
A pentagonal pyramid is a pyramid with a pentagonal base upon which are erected five triangular faces that meet at a point.
It is a three dimensional figure, it is a solid figure or an object or shape that has three dimensions—length, width, and height.
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Solve for kkk.
20-6+4k=2-2k20−6+4k=2−2k20, minus, 6, plus, 4, k, equals, 2, minus, 2, k
k =k=k, equals
The value of k is -2
Now, According to the question:
The given equation is:
20 - 6 + 4k = 2 - 2k
We have to solve for the value of k.
Now,
20 - 6 + 4k = 2 - 2k
Combine the like terms;
20 - 6 - 2 = -2k - 4k
Calculate the sum or difference:
20 - 8 = -6k
12 = -6k
Calculate the product or quotient:
k = -12/6
k = -2
Hence, The value of k is -2
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All sides of a lawn are expanded by the same amount so that it’s dimension are now 100 feet by 60 feet. If x is the same amount of length added to each side, write a function of x giving the length of each of the original sides. Use these functions to make a function for the area of the original lawn.
The function of x giving the length of each of the original sides would be [tex](x + 100) * (x + 60) = x^2 + 160x + 6000[/tex].
What is Function of x?
A function is a formula that expresses one variable in terms of another. The statement "y is a function of x" (denoted y = y(x)) states that y changes depending on the value of x.
The original length of each side of the lawn can be represented by the function x + 100, and the original width can be represented by the function x + 60.
To find the area of the original lawn, we can multiply the length and width functions.
So, the function for the area of the original lawn is:
[tex](x + 100) * (x + 60) = x^2 + 160x + 6000[/tex]
This is a quadratic function in x, whose leading coefficient is 1, and the value of x is the same amount of length added to each side of the lawn.
Hence, The function of x giving the length of each of the original sides would be [tex](x + 100) * (x + 60) = x^2 + 160x + 6000[/tex].
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relative frequency distributions are generally more useful than frequency distributions when
Relative frequency distributions are generally more useful than frequency distributions when comparing data sets of different sizes.
Frequency distributions can show the actual number of observations falling in each range or the percentage of observations. In the latter sample, the distribution is called a relative frequency distribution.
Frequency distribution tables can be utilised for both categorical and numeric variables. Continuous variables should only be used with class intervals, which will be described shortly.
A relative frequency distribution displays the proportion of the total number of observations associated with each value or class of values and is related to a probability distribution, which is extensively used in statistics.
--This question is incomplete; the complete question is
"Relative frequency distributions are generally more useful than frequency distributions when _____."--
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what is the smallest even consecutive number such that their sum is at most 90?
SOLVE PLEASE
To find the smallest even consecutive numbers whose sum is at most 90, we can start with the smallest even number, which is 2. Then, we can add 2 to it to get the next even number, which is 4. We can keep adding 2 to get the next even numbers, and keep track of their sum. We can stop as soon as the sum exceeds 90.
The smallest even consecutive numbers whose sum is at most 90 are 2, 4, 6, 8, 10, 12, 14, 16, 18, 20, 22, 24, 26, 28, 30, 32, 34, 36, 38, 40, 42, 44, 46, 48, 50, 52, 54, 56, 58, 60, 62, 64, 66, 68, 70, 72, 74, 76, 78, 80, 82, 84, 86, 88, 90
The first 20 even consecutive numbers sum 90.
Jason is closing on a $430,000 home. He made a 13% down payment and is borrowing the rest. What is the approximate range of costs that he might expect to pay at the closing?
Answer:
$8,600 - $31,100
Step-by-step explanation:
Hope this helps :)
Give f(x)=3-|2x-5| find f(0)+f(-4)
The value of the function f(0) + f(-4) is -12
How to determine the value of the function?From the question, we have the following equation that can be used to solve the question
f(x) = 3 - |2x - 5|
Also, we have the function values to be
f(0) and f(-4)
When these values are calculated, we have
f(0) = 3 - |2(0) - 5| = -2
f(-4) = 3 - |2(-4) - 5| = -10
substitute the known values in the above equation, so, we have the following representation
f(0) + f(-4) = -2 - 10
Evaluate
f(0) + f(-4) = -12
Hence, the solution is -12
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Help please!!! (3x² - 4xy + y²)(4x + 3y)
The simplified form of the expression (3x² - 4xy + y²)(4x + 3y) is 12x³ - 7x²y + 8xy² + 3y³.
What is the simplified form of the expression?Given the expression in the question;
(3x² - 4xy + y²)(4x + 3y)
To simplify, apply distributive property by multiplying each term in the first expression by each term in the second expression.
(4x + 3y)(3x² - 4xy + y²)
4x (3x² - 4xy + y²) + 3y(3x² - 4xy + y²)
3x² × 4x - 4xy × 4x + y² × 4x + 3x² × 3y - 4xy × 3y + y² × 3y
12x³ - 16x²y + 4xy² + 9x²y - 12xy² + 3y³
Collect like terms
12x³ - 16x²y + 9x²y + 4xy² - 12xy² + 3y³
Add -16x²y and 9x²y
12x³ - 7x²y + 4xy² - 12xy² + 3y³
Add 4xy² and -12xy²
12x³ - 7x²y + 8xy² + 3y³
Therefore, the simplified form is 12x³ - 7x²y + 8xy² + 3y³.
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Given a rope 10 units in length, if side lengths must be in whole units, how many different triangles can be made?
A per the measurement, there is only form exactly 1 unique triangle.
The term triangle in math is known as a two-dimensional shape with three sides, three interior angles, and three vertices.
Here we have know that a rope 10 units in length, if side lengths must be in whole units.
And we need to find the number of different triangles can be made.
Here we know that length is 10 units, and the side length are whole units.
Which means that here we have 3 distinct value.
So as we all know that all of the triangles you make are the same triangle. Which means that if your three side lengths can form a triangle, then they can only form exactly 1 unique triangle.
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PLEASE HELP ASAP
Find the value of r so that the line through (r,5) and (6,r) has a slope of 5/8
Answer: 70/13
Step-by-step explanation:
Slope = rise/run
(r-5)/(6-r) = 5/8
30-5r = 8r-40
70 = 13r
70/13 = r
A set of elementary school student heights are normally distributed with a mean of 105 centimeters and a
standard deviation of 10 centimeters. Faisal is an elementary school student with a height of 103. 1 centimeters.
What proportion of student heights are lower than Faisal's height?
You may round your answer to four decimal places
Answer:
0.4247
Step-by-step explanation:
You want to know the proportion of heights less than 103.1 cm if the population is normal with a mean of 105 cm and a standard deviation of 10 cm.
ProportionThe proportion can be found using a suitable probability calculator. The one shown in the attachment tells us ...
the proportion of heights less than 103.1 cm is about 0.4247.
__
Additional comment
The height of interest is less than the mean by approximately 0.2 times the standard deviation. This suggests the proportion will be close to, but less than, 0.5000.
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The length of the minute hand of a clock i 6cm. Find the area wept by it when it move from 7:05 p.m. to 7:40 p.m.
Area swept by minute hand of a clock is 66cm².
Given that length of the minute hand of clock is 6cm.
We know that, total angle covered by the minute hand of clock is 360° in 60 minutes.
Total time interval = 7:45 PM – 7:05 PM = 35 minutes
In 60 minutes 360° angle covered
Then, in 1 minute 360/60 angle covered
So, in 35 minutes
total angle covered = 360/60 * 35 = 210°
Total area covered = sectional area of circle with radius 6cm
Total area covered = Ф/360 * πr²
= 210/360 * 22/7 * 6² = 66 cm²
Therefore, total area swept by minute hand of a clock is 66cm².
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Consider the function g(x)=6cos(7x+22).
How much must x increase by for 7x+22 to increase by 2π?
After the increment in the function the value of x is -2.25
In math the term function is denoted as a relation from a set of inputs to a set of possible outputs where each input is related to exactly one output.
Here we know that the function g(x)=6cos(7x+22), x increase by for 7x+22 to increase by 2π.
In order to calculate the value of x in the function, we have to equate the value of function with 2π.
Then we get,
=> 7x + 22 = 2π
When we solve the equation for x then we get,
=> 7x = 2π - 22
=> x = (2π - 22)/7
When we simplify this one then we get the value of x as,
=> x = 0.285π - 3.14
=> x = 0.89 - 3.14
=> x = -2.25
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A recipe states that chicken needs to be cooked for 15 minutes per kg plus an extra 40 minutes. Express the relationship between mass and cooking time using function notation, and define the domain and range.
For the given statement, the domain and range are - Domain : x ,Range : f(x) 40.
What does a notation in mathematics mean?In mathematical notation, symbols are used in expressions and formulas to represent operations, unnamed numbers, relations, and any other mathematical objects. In mathematics, science, and engineering, mathematical notation is frequently used to communicate complicated ideas and properties in a clear, unambiguous manner.
A notation is a set of clear guidelines for using symbols to describe numbers and actions.
The sum of numerous linked terms is frequently represented by the sign (capital sigma) in shorthand notation. In statistics, sigma notation is frequently employed.
For each dividend number, the extended notation division method merely repeats the division, multiplication, and subtraction operations.
Given data :
x is the mass of the chicken (in kg)
f(x) : the cooking time ( in minutes )
Domain : x
Range : f(x) 40
f(x) = 15x + 40 - 15 minutes per kg (x) plus 40 more minutes
f (1) = 15 x 1 + 40 = 55
A 1 kg chicken needs 15 min + 40 min = 55 min
f (2) = 15 x 2 + 40 = 70
A 2 kg chicken needs 30min + 40 min = 70 min
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2. Consider this excerpt from chapter 39: "Something is discomforting about a sun that gives no
heat but keeps shining. " In this comparison, who is the sun?
O The tour guide
Maxine
Jade's mother
The symphony members
Jade's mother is the sun of Jade because she motivated Jade against race and gender, class and privilege, and fear and courage. Something is discomforting about a sun that gives no heat but keeps shining. " In this comparison, Jade's mother is the sun. So the option 3 is correct.
While expressing the complicated emotions of an aspirational, devoted girl, Jade's narrative voice offers riveting insights on the intricacies of race and gender, class and privilege, and fear and courage. Watson's story, which brims with empathy and wisdom, extols the ability of creative expression to reimagine and transform the world.
The many individuals who find themselves in the world looking for themselves are addressed in Watson's exquisitely written book. Piecing Me Together is a novel about how young people deal with the struggles and pain of daily life while remaining entire and true to themselves. It is both timely and timeless.
The reason why Jade's mother is said to as the sun of Jade is because she inspired Jade to overcome prejudices related to class, privilege, and fear.
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The complete question is:
Consider this excerpt from chapter 39:
Something is discomforting about a sun that gives no heat but keeps shining. " In this comparison, who is the sun?
1. The tour guide
2. Maxine
3. Jade's mother
4. The symphony members
Find the lateral area, and surface area of the figure.
Round your answers to the nearest thousandth, if necessary
Lateral Area = 108 square km
Surface Area = 120 square km
Think of the triangles as the floor and ceiling of this 3D room. The walls are three rectangular sides.
We have a 9 by 4 wall with an area of 9*4 = 36 square km
We have a 9 by 3 wall with an area of 9*3 = 27 square km
We have a 9 by 5 wall with an area of 9*5 = 45 square km
The lateral area is 36+27+45 = 108
The two triangles form the base faces of this prism.
Let's find the area of one of the triangles
area=0.5*base*height = 0.5*3*4 =6
One triangle has an area of 6, so both triangles in total have an area of 2*6 = 12 square km.
The total surface area is therefore 108+12 = 120 square km.
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Shirley can choose between peanut butter pretzels and caramel coated popcorn for her evening snack. According to economists, her _____ cost of consuming caramel coated popcorn would be the forgone peanut butter pretzels. Group of answer choices internal opportunity average transaction social
According to economists, her opportunity cost of consuming caramel-coated popcorn would be the forgone peanut butter pretzels.
Opportunity costs are the possible advantages that a person, investor, or company forgoes while deciding between two options. Opportunity costs are by definition invisible, making it simple to ignore them.
Better choices can be made by being aware of the opportunities that might be lost when a company or person chooses one investment over another. It is necessary to weigh the advantages and disadvantages of each choice offered in order to correctly assess opportunity costs.
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Please help with this problem!!!
At 11.5 hours, the red turtle pass the blue turtle. The red turtle won the race. The solution has been obtained by studying graph of the functions.
What is graph of the function?
The collection of all points in the plane with the form (x, f(x)) that make up a function f's graph. The graph of f is also known as the graph of
y = f(x).
In the graph, it is seen that from 6 to 13 hours, the blue turtle is at the same place whereas the red turtle is moving.
Therefore, at 11.5 hours the red turtle passes the blue turtle.
The red turtle won the race in 16 hours because in the graph it is observed that the blue turtle did not complete the entire km. The graph of blue turtle is a little less than that of red turtle.
Hence, at 11.5 hours, the red turtle pass the blue turtle and wins the race.
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Since there are multiple questions, so the question answered above is attached below.
Write the missing angle measure next to each
letter.
65°
a, b, c, d, e
The angle relationship I used to find Angle a is...
The angle relationship I used to find Angle b is...
The angle relationship I used to find Angle c is...
The angle relationship I used to find Angle d is...
The angle relationship I used to find Angle e is...
The missing angle measure for the following letters are:
a - 65°
b - 115°
c - 115°
d - 65°
e - 65°
The angle relationship I used to find Angle a is the Corresponding Angle (a = 65°)The angle relationship I used to find Angle b is Angles on a Straight line (b = 180 - 65)The angle relationship I used to find Angle c is the Corresponding Angle (b = c)The angle relationship I used to find Angle d is Angle on a straight line (d = 180 - 65) = 115°The angle relationship I used to find Angle e is. Corresponding angles. d = e and e = d.What is a corresponding angle?Corresponding angles are generated when two parallel lines are crossed by a transversal.
Opening and closing a lunchbox, completing a Rubik's cube, and endless parallel railway tracks are all examples of equivalent angles.
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Ayúdenme a encontrar el valor de los ángulos la medida de A) es 48 grados y E) es 136 grados y con eso encuentra los valores de los demás
eeeeeAnswer:
Step-by-step explanation:
The equation, 868 = 700(1 + 0.04t), represents the amount of money earned on a savings account. What does the value 868 represent?
A. The value 868 represents the amount of interest earned, which means $868 was added to the initial balance.
B. The value 868 represents the final balance in the account, which means the account balance started with $868.
C. The value 868 represents the final balance in the account, which means the account ended with $868.
D. The value 868 represents the initial balance in the account, which means the account balance ended with $868.
The number 868 represents the final balance of the acount, then we conclude that the correct option is C.
"The value 868 represents the final balance in the account, which means the account ended with $868."
What does the value 868 represent?Weknow that the equation 868 = 700(1 + 0.04t) represents the amount of money earned on a savings acount.
We want to see what does 868 represent in this situation.
Where the form of the equation is:
money earned = function that depends on t.
So the value at the left, 868, just represents the final balance of the account, this is the amount of money that there is in the account at the end.
Thus, the correct option is C.
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Joseph took a taxi from his house to the airport. The taxi company charged a pick-up
fee of $3. 10 plus $2 per mile. The total fare was $21. 10, not including the tip. Write
and solve an equation which can be used to determine m, the number of miles in the
taxi ride.
The equation is 2m + 3.10 = 21.10
And, the number of miles in the taxi ride is m = 9.
Now, According to the question:
Joseph took a taxi from his house to the airport. The taxi company charged a pick-up fee $3.10 plus $2 per mile. The total fare was $21.10.
Now,
The equation is written as,
2m + 3.10 = 21.10
Subtract 3.10 from both sides
2m = 18
Divide 2 from both sides
m = 9
Hence, The equation is 2m + 3.10 = 21.10
And, the number of miles in the taxi ride is m = 9.
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Which even number is not a composite number?
A) 6
B) 4
C) 2
D) 8
a cell phone company has three different production sites. five percent of the phones from site 1, 7% from site 2, and 9% from site 3 have been recalled due to unexpected shutdown issue. suppose that 60% of the phones are produced at site 1, 30% at site 2, and 10% at site 3. if a randomly selected cell phone has been recalled, what is the probability that it came from site 3 (write it up to second decimal place)?
So, the probability that a randomly selected cell phone that has been recalled came from site 3 is 2.5 or 25%.
We can use Bayes' theorem to calculate the probability that a phone that has been recalled came from site 3. Bayes' theorem states that:
P(A|B) = P(B|A) * P(A) / P(B)
where:
P(A|B) is the probability of event A occurring given that event B has occurred (in this case, the probability that a phone came from site 3 given that it has been recalled)
P(B|A) is the probability of event B occurring given that event A has occurred (in this case, the probability that a phone has been recalled given that it came from site 3)
P(A) is the prior probability of event A occurring (in this case, the probability that a phone came from site 3)
P(B) is the prior probability of event B occurring (in this case, the probability that a phone has been recalled)
So, in this case, we have:
P(site 3 | recalled) = P(recalled | site 3) * P(site 3) / P(recalled)
We know that:
P(recalled | site 3) = 9%,
P(site 3) = 10%
We also know that:
P(recalled) = P(recalled | site 1) * P(site 1) + P(recalled | site 2) * P(site 2) + P(recalled | site 3) * P(site 3)
= (5% * 60%) + (7% * 30%) + (9% * 10%) = 3% + 2.1% + 0.9% = 6%
So, we can now calculate the probability that a phone that has been recalled came from site 3 as:
P(site 3 | recalled) = (9% * 10%) / 6% = 0.15 / 0.06 = 2.5
So the probability that a randomly selected cell phone that has been recalled came from site 3 is 2.5 or 25%.
To learn more about Bayes' theorem
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