A jar contains 2 red, 5 green, 2 blue and 6 yellow marbles. A marble is chosen at random from the jar. After replacing it, a second marble is chosen. What is the probability of choosing a green and then a yellow marble?
Answer:
Step-by-step explanation:
The probability of picking an item A in a box of N items depends on nA, the amount of items A in the box at the time of picking, with the kinda instinctive value:
p = nA / N
then it means that if you have no green ball, the probability is 0/N = 0, if you only have green balls, it means you have a probability of N/N = 1 = 100%, and if you have as many green balls as non-green balls, you have a probability of nA/(2nA) = 0.5 = 50%.
Here the probability of first picking a green ball (nG=5) in a box of N=3+5+2+6=16 for the 1st pick is:
pG1 = 5/16
Now the trick here is that once you picked the green ball, you put it back in the box before picking another ball. So you still have N=16 balls for the second pick, and the probability of picking a yellow ball (nY=6) for the 2nd pick is:
pY2 = 6/16 = 3/8
(it would have been slightly higher, at 6/15, if you did NOT put back the green marble in the box).
Now you want BOTH events to be true. So you want G1 to be true AND Y2 to be true. The two events are independent (the probability of Y2 is 6/16 if you had G1 but is also 6/16 if you failed G1), so the probability of having both is simply done by multiplicating them:
pG1Y2 = pG1 * pG2 = 15/128
help asap plz i just cant
Answer:
(0,-7)
(1,-9)
(-1,-5)
(-2,-3)
Step-by-step explanation:
Your slope would be 2/3
I think this is right. Let me know if you know the formula and i can explain it to you!
HEEEELLLLLLLLPPPPPPPPPP!!!!!!!!
NO SCAMS!!
Answer:
..........???
Step-by-step explanation:
I'm confused...... sorry for taking your points
Let's say that xy=z. If zx=y, what would x, y, and z equal?
Answer:
[tex]x = 1[/tex]
[tex]y=z[/tex]
Step-by-step explanation:
[tex]xy = z\\zx = y[/tex]
Substitute [tex]z[/tex] and [tex]y[/tex] back into the equations.
[tex]xyx =y\\x^2y=y\\x^2=1\\x=\sqrt{1} = 1[/tex]
[tex]z(1) = y\\z=y[/tex]
We cannot find [tex]z[/tex] and [tex]y[/tex] as we don't have enough information.
6. There are 16,709 planks on the rope bridge. If Horton crosses 7,012 planks before the bridge starts to break, how many planks are left?
Answer:
9697
Step-by-step explanation:
16,709-7012=9697
Marcos was born in 1998. His grandmother was born forty-five years earlier. What year was Marcos' grandmother born?
A. 2043
B. 2033
C. 1954
D. 1953
Answer:
the answer is d
Step-by-step explanation:
Answer:
D
Step-by-step explanation:
1998- 45= 1953
Tickets to a school musical cost $7.25. The amount received from ticket sales is $833.75. How many tickets were sold?
Answer: 115
Divide 833.75 by 7.25
The time required to make one bouquet in a flower stall is of an hour. Find the time
required to make 18 such bouquets.
Answer:
13.5 hours
the fitness gram pacer test is a multi stage aerobic capacity test that progressivly gets more difficult as it continues
Answer: Answer: 27/2 of an hour
Step-by-step explanation: Time required to make 1 bouquet = 3/4 of an hour
Time required to make 18 bouquet = ?
= 18 × 3/4
please help with this anyone
What is the equation for this line?
.
pleasee help w all of them
1. which value makes this inequality TRUE? x - 12 ≥ 8
a) 4
b) 8
c) 12
d) 20
2. the goalie for a hockey team has faced no more than 40 shots on goal (s) this season. which inequality represents this situation?
a) S < 40
b) S > 40
c) S ≤ 40
d) S ≥ 40
3. which inequality is TRUE?
A) |-25| < |-11|
B) |-20| < 13
C) |17| > |-20|
D) |-14| > |-15|
Answer:
12, S>40, |17| > |-20|
Step-by-step explanation:
Answer:
x>_20
s<_40
ans of 3rd is D
Step-by-step explanation:
Find the product of two monomials: 4ab X - 5ab
Answer:
-20a^2b^2
Step-by-step explanation:
4ab * -5ab we see the qu asks to multiply a negative with a positive
so we automatically know it will be a negative. and we know monomials become squared.
4 x -5 = -20
ab x ab = a^2 b^2
As a full sum.
4ab * -5ab = -20a^2 b^2
Find the area of the circle below. Use 3.14 for pi
Answer:
Es igual a 28,26 centímetros2.
Step-by-step explanation:
What is the volume of the figure below?
2 stacked rectangular pyramids. The pyramids have a base of 4 feet by 5 feet and a height of 4.5 feet.
30 feet cubed
60 feet cubed
90 feet cubed
120 feet cubed
Answer:
60 feet cubed
Step-by-step explanation:
find the volume of the first pyramid then multiply by 2 since there are 2 of them.
What is the value of x?
Answer:
-1
Step-by-step explanation:
Emesto has painting class every 2 weeks. Kamala has a pottery class every 5 weeks. Emesto and Kamala met at the art building for class this week. how many weeks will it be unitl they see each other again?
- 7th grade work -
Please help, and answer only if you have an answer.
Answer:
$268.38
Step-by-step explanation:
First we will take off the 20% off the 315 dollars. SO we can do this by saying that the discounted price is 80% of the original price, (because 100 - 20 = 80). So 0.8 * 315 = 252. So 252 = discounted price. So then we have to add the tax price.
Sales tax is %6.5, so we can do 252*0.065 to find the tax payed. We get 16.38, so we can dd this to our discounted price to get 252 + 16.38, or $268.38
Please answer this question asap!!!!!!!!1
Answer:
i think its 2400 square metres
Step-by-step explanation:
Answer:
3656.64 m^2 to nearest hundredth.
Step-by-step explanation:
Area = area of rectangle + area of a circle
The radius of the circle = 1/2 * 40 = 20.
Area = 40*60 + π*20^2
= 3656.64 m^2.
plz help meeeeeeeeee
What is the surface area of the prism? Measurements are the length is 6cm the width is 4cm and the height is 9cm
Type number and unit (the unit can be in words).
Answer:
228
Step-by-step explanation:
is it a rectangle prism?
if so, do This:
2(lb+hb+hl)
Length - 6
width = 4
height = 9
2(24+36+54)
2 ( 114)
= 228
I hope this helps!
help me with this please show work thanks
Answer:
first thing is first u have to do 5+2 =7 then do 8+4=12 your answer will be 7/12
Step-by-step explanation:
Hey yalll? Any of you good at math!
7a
c²=a²+b²
c²=3²+4²
c²=9+16
c=25
c=5
7b
c²=a²+²
c²=12²+16²
c²=144+256
c²=400
c=20
7c
c²=a²+b²
c²=14²+48²
c²=196+2304
c²=2500
c=50
8.
c²=a²+b²
17²=8²+b²
17²-8²=8²-8²+b²
289-64=b²
225=b²
15=b
9.
c²=a²+b²
6²=a²+3²
6²-3²=a²
36-9=a²
27=a²
5.196=a
5.20=a
10.
c²=a²+b²
15²=a²+12²
15²-12²=a²
225-144=a²
81=a²
9=a
11.
The formula for finding the diagonal of a square is d=s√2
d=s√2
d=(7)√2
d=7√2
d=(7)(1.414)
d=9.898
d=9.9
PLEASE HELP WITH THESE QUESTIONS
Answer:
32
Step-by-step explanation:
8X4
Answer:44.56637
Step-by-step explanation:
12.56637+32=44.56637
just i lilbit more plz help me
Answer:
36
Step-by-step explanation:
1/3y = 12
12 x 3 = 36
y = 36
Answer:
y=4
Step-by-step explanation:
bring the y by the 1/3 down , turn the 12 into a fraction so it will b 12/1 so u would do 1/3 devided by 12/1 so it would b y=4
10 pts per question on timed test!!!!!
What are the dimensions of the base of the pyramid?
choices
8 ft by 6 ft
8 ft by 3 ft
6 ft by 3 ft
8 ft by 9 ft
PLS HELP
What is the greatest common factor(gcf) of the expression 4a3b2 + 6a2b + 8ab3?
a
2ab
b
24ab
c
2a^3b^3
d
24a^3b^3
Answer:
2ab is the answer! :)
Step-by-step explanation:
Lawanda pours a can of mixed vegetables into a pot on the stove. There are 82 green beans, 13 carrots, and 23 lima beans. Without looking, she reaches in with her spoon and pulls one vegetable. What is the probability that she will spoon out a carrot?
Answer:
A
Step-by-step explanation:
I need help with this mean, median, and averages etc. Brainliest is depending on correct answers and explanations. And don't look up answers.
Which ratio is equivalent to 33:11?
Answer:
3:1
Step-by-step explanation:
33 / 11 = 3
11/ 11 = 1
Please Help :( Due tomorrow 5/21
1. Point A is on a number line halfway between -20 and -4. Point B is halfway between point A and 0. What integer is represented by point B?
2. Nine Celsius temperatures are recorded in a lab. The middle temperature is 0°C. What is the maximum number of temperatures that could be represented by negative numbers?
Answer:
1. point A is -8 and 0 is -4
Step-by-step explanation: