There are 22 students in Bella’s class. The class is voting for 2 students to represent them on a committee. What is the probability Bella’s two choices will be picked? (Assume the vote is random.)

Answers

Answer 1

Answer:

well wouldnt there be a 50/50 chance her choice will be picked since there are only 2 im sorry if im wrong

Step-by-step explanation:

Answer 2

Probabilities are used to determine the chances of an event.

The probability that Bella’s two choices will be picked is 1/231

The parameters are given as:

[tex]\mathbf{n = 22}[/tex] -- number of students

[tex]\mathbf{r = 2}[/tex] --- Bella's selection.

Each student in the class have an equal chance.

So, the probability of selecting a student is:

[tex]\mathbf{Pr = \frac 1{22}}[/tex]

The probability that Bella's two choices are picked is:

[tex]\mathbf{Pr = P(First\ and\ Second)\ or\ P(Second\ and\ First)}[/tex]

So, we have:

[tex]\mathbf{Pr = \frac{1}{22} \times \frac{1}{22 - 1} + \frac{1}{22} \times \frac{1}{22 -1}}[/tex]

NB: 1 is subtracted, because no students can be selected more than once

So, we have:

[tex]\mathbf{Pr = \frac{1}{22} \times \frac{1}{21} + \frac{1}{22} \times \frac{1}{21}}[/tex]

[tex]\mathbf{Pr = \frac{1}{462} + \frac{1}{462}}[/tex]

Take LCM

[tex]\mathbf{Pr = \frac{1 +1}{462}}[/tex]

[tex]\mathbf{Pr = \frac{2}{462}}[/tex]

Simplify

[tex]\mathbf{Pr = \frac{1}{231}}[/tex]

Hence, the probability that Bella’s two choices will be picked is 1/231

Read more about probabilities at:

https://brainly.com/question/11234923


Related Questions

Can you solve this for x? 7x-1

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Answer 1/7 hope it helps

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will mark as brainliest.​

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Answer:

integer

Step-by-step explanation:

the slope looks like it's 4/1 when simplified it's 4. (integer)

Answer:

The slope is the integer 4

Step-by-step explanation:

take the points (-2, -9) (-1, -5) and put them in the formula  y2 - y1 over x2 - x1 and you get m = 4

There are four people in stevens family there shoe sizes are 6 8 10 and 10 what is the range shoe sizes in stevens family

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Answer:

4

Step-by-step explanation:

Range is the difference between the highest and lowest values of a set of observations

Range = highest value - lowest value

10 - 6 = 4

Answer:

4

Step-by-step explanation:

simple.... are ya crazy

I need help finding the answer

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Answer

3 hours 40 mins

3 hours and 40 minutes is your answer or 3:40

Mary noticed 5 ants in her pantry on Monday. On Tuesday she counted 15 ants in the pantry. On Wednesday she counted 45 ants in the pantry. Part A Determine an exponential function model to represent the number of ants in the pantry in terms of the number of elapsed days. Explain how you arrived at your model. Part B Using your exponential model predict how many ants would be in the pantry by Friday if the trend continues. Explain if your response is reasonable. Part C Does the problem situation represent exponential growth or decay? Justify your reasoning.

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Answe

a is y=1.66667(3)^x

b is 405

c I don't know  sorry

Step-by-step explanation:

Alex buys a palm tree that has a price tag with $65, but he found a coupon that has a discount of 25%. How much will Alex pay after the discount?

Answers

Answer:

Alex will pay $48.75 after the discount.

Step-by-step explanation:

With the information provided, in order to find the amount Alex will pay after the discount, first, you have to find the amount of the discount by calculating 25% of the price and then, you have to subtract that discount from the price:

$65*25%=$16.25

$65-$16.25=$48.75

According to this, the answer is that Alex will pay $48.75 after the discount.

Help!!! Zoom in on the picture if you need a closer look

Answers

Answer:

the answer is 40 inches

Step-by-step explanation:

8x5=40

Answer:

40 sq inches

Explanation: have an amazing day!

Question #16: Suppose you have a bag containing 30 marbles. If the
probability of drawing a black marble is 50%, how many black marbles are
in the bag? *
15
2
20
18

Answers

15 marbles will be in the bag

Answer:

15

Step-by-step explanation:

50% is half, so what is half of 30?

Questions on Venn diagram​

Answers

Answer:

Ur question?

Step-by-step explanation:

Answer:

What is the question

Step-by-step explanation:

Help me with this pls

Answers

Answer:

=4^6 .4^-8

= 4^6-8

=4^-2

Answer:

Hi, there your answer is

[tex]4^{-2}[/tex]

Step-by-step explanation

[tex]4^{6} *4^{-8}[/tex]

[tex]4^{6+(-8)}[/tex]

[tex]4^{-2}[/tex]

Hope this helps :)

PLEASE HELP! MIDDLE SCHOOL MATH! The dot plot below shows the number of baskets made by Elena over 12 practice sessions. What is the mean absolute deviation (MAD) for Elena's data? (The mean is marked by the red triangle)

Answers

Answer:

I suck at math so sorry

Answer:

Elena’s MAD:  2

Step-by-step explanation:

 24  ÷ 12 = 2

2. The ratio of the sides of two similar polyon is 3:2
The area of the smaller polygon is 24 cm squre? What is the area of the large polygon?​

Answers

Answer:

36 cm square will be the correct answer

3/x=2/24
Do cross products 2x=72
Divide by 2 on both sides
Answer is 36 cm squared

PLEASE HELP ME IM BEGGINGG

Flora and Gabe will randomly select from a bag of candy containing 6 grape,
8 cherry, and 6 lime Jolly Ranchers. Which of the following has the greatest
probability of occurring?

Answers

Answer:

Step-by-step explanation:

Flora picks a cherry then replaces it then picks another cherry, there are 8 cherries so if you take away one you still have 7 and 7 > 6.

∠10° is complementary to which of the following angles?

Answers

Answer:

80

Step-by-step explanation:

Complementary angles add up to 90.

So 90-10=80.

Answer:

∠80°

Step-by-step explanation:

NOTE: Complementary is when the sum of two angles is equal to 90° degrees

Please mark as brainliest if answer is right

Have a great day, be safe and healthy  

Thank u  

XD  

Need help with school

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Answer: sussy Explantion: play some amogus

Write the phrase as an expression.

six more than three times a number w

Answers

Answer:

6+3x=w

Explanation:

6 *more* more always means + and then three *times* times always means *so it would equal 6+3x=w

What is the perimeter of a half circle with a radius 22cm .round your answer to the nearest whole number

Answers

Answer:

113.115 cm

Step-by-step explanation:

Formula:

C = 2πr

Given:

Radius: 22 cm

Diameter: 44 cm

The perimeter of a semicircle is the sum of half of the circumference of the circle and its diameter.

Simply plug in your numbers to find the circumference first.

C = 2π(22)

C = 44π cm or 138.23 cm

Then, divide the circumference in half, and add your diameter.

Perimeter = (44π/2) + 44 = 113.115 cm

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x = ___ cm

Answers

Answer:

3.75 cm

Step-by-step explanation:

20 * x = 5 * 15

20x = 75

Divide both sides by 20

x = 75/20

x = 3.75

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Answers

Answer:

Landing on Blue: Likely

Landing on Green: Impossible

Landing on Yellow: Unlikely

Step-by-step explanation:

Blue: 50% chance

Green: 0% chance

Yellow: 12.5% chance

Answer:

So blue is 4/8 which should be as likely as not then red is 3/8 could be unlikely since it is 38 percent. then yellow is for sure unlikely since it is just 1/8

(Repost) PLEASE HELP GUYS!!

Answers

Answer:

b and e are the correct numbers

Step-by-step explanation:

i hope this helps :)

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sientific calculator. heh.. :)

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What is 1+1 my dad hasn’t got the milk yet and it’s been 20 years since I’ve been to school I’m a fetus and I ended up walking my fish to the park so he could walk.

Answers

Answer:

its 32, and the world is a fetus now too

Step-by-step explanation:

Answer:

1+1=2

Step-by-step explanation:

LOL this question was all over the place but so funny!!

Find the missing values in the Table of Values. Write your numbers from top to bottom in the space below with a comma between each value.

PLEASE DON'T GIVE A LINK OR DELETE THE ANSWER BECAUSE THIS IS MY SECOND TIME POSTING THIS SO PLS PLS PLS GIVE A PROPER ANSWER TO ALL OF THE PICTURES.

Answers

Answer:

Alright, with this, its essentially asking for you to plug in X into each equation for the answer.

With the first box, it asks for y = 5 - x, given the x = -2.

y = 5-x

y=5-(-2)

y=5+2

y=7

With the second box down, it wants things a bit differently, it gives you the y value, and wants for you to find the x. Given this, this question can be done backwards for the x value.

y = 5-x

6 = 5-x

x+6= 5

x=-1

With the third one, its the same thing as with the first box.

y = 5-x

y = 5-0

y = 5

Same thing with the fourth one.

y = 5-1

y = 4

If you have any question about the process or the answer, please comment below and I can help explain on what you're stuck on.

Answer:

Picture 1: (-2, 7), (-1,6), (0,5), (1,4)

Picture 2: (-2, -6), (4,6), (0,-2), (1,0)

Picture 3: (-1, -4), (8,5), (1,-2), (5,2)

I need help on this one fast plz … no links

Answers

Answer:

condensation

Step-by-step explanation:

The water from the ocean evaporates then condenses to form clouds

Water vapor gets into air mainly by evaporation


A line passes through points (2,5) and (5, 14). What is the slope of this line?

Answers

We know that:

Slope of a line = change in y coordinate / change in x coordinate

We are given:

First point = (2,5)

Second point = (5, 14)

Calculating the change in y coordinate:

change in y (also represented by Δy) = second y - first y

Δy = 14 - 5

Δy = 9

Calculating the change in x coordinate:

Δx = second x - first x

Δx = 5 - 2

Δx = 3

Slope of the line:

Slope = (Δy) / (Δx)

Slope = 9 / 3                                              [replacing the values]

Slope = 3

If DA is a diameter of oz and mZDZC = (2x), find mZCZB.
A. 22°
B. 58°
C. 690
D. 73°

Answers

D. I took the test

The diameter of a circle is 9 m. Find the circumference to the nearest tenth.​

Answers

Answer:

Circumference = diameter × π

Take π =3. 14

9×3. 14 = 28. 26 ~ 28. 3

Find the area of the parallelogram.
75 cm
50 cm
Area =

Answers

Answer:

3750

Step-by-step explanation:

50*70=35005

5*50=250

Find the missing side length. Round to nearest 10th

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Answer:

6.3 Use Pythagorean theorem

Step-by-step explanation:

Can someone plz help me on this plz I beg u

Answers

Answer:

8

Step-by-step explanation:

So, lets go over a few things:

First off, all triangles have a total angle of 180 degrees.

Secondly, we know that the first two angles are 57 and 51.

Thirdly, we know that the missing angle is 9x

To solve this, we must add together the known angles, subtract them fro 180, and divide that by 9. This will give us the missing x value.

So, add together the two angles we know:

57+51

=

108

So we know 108 degrees of our triangle. We must find whats left of the 180.

To do this, subtract 108 from 180:

180-108

=

72

So our remaining angle is 72 degrres.

But recall that x isnt the misisng angle, 9x is.

So, to get x on its own, we must divide both the missing angle and 9x by 9:

72=9x

---  ---

9   9

=

8=1x

So now we know that x equals 8.

I hope this helps! :)

Answer:

X = 8

Step-by-step explanation:

Okay so we know that there are a total of 180 degrees in every triangle. We need to create the equation to define the triangle's angles. 51 + 57 + 9x = 180. Then, we will solve for x.

180 = 51 + 57 + 9x  we are going to simplify the equation by solving what we can

180 = 108 + 9x         * Now we will isolate x

180 - 108 = 9x          * Solve the left side of the equation

72 = 9x                     * Divide both sides by 9

8 = x                    

Justin likes to get 7 hours of sleep. He woke up after sleeping for 5 1/3 hour. How many more hours does he need to get the amount of sleep he likes?

Answers

Answer:

He needs 1 hour 40 minutes more to get the amount of sleep he likes or 1 2/3 hours

Step-by-step explanation:

Justin likes to get 7 hours of sleep.

He woke up after sleeping for 5 1/3 hour = 5 hours 20 mins

Number of more hours needed to get the amount of sleep he likes= 7 hours - 5 1/3 hours.

1 hour = 60 minutes

1/3 hours = 60/3 = 20 minutes

Hours         Minutes

7                     00       when we borrow 1 hour we borrow 60 minutes

5                    20

1                   40

He needs 1 hour 40 minutes more to get the amount of sleep he likes

or 1 2/3 hours

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