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777dan777 [17]
3 years ago
5

A bag contains marbles: 5 red, 2 blue, and 1 green. You pick a marble and then another one without replacement. What is the prob

ability you will draw a red and then a green?
Mathematics
1 answer:
max2010maxim [7]3 years ago
5 0

hi

1st draw: green

2/12. (2 green out of 12 marbles), reduces to 1/6

2nd draw: blue

4/11 (4 blue marbles out of the 11 marbles remaining after 1st draw.)

Probability of theses BOTH happening: multiply these individual probabilities.

Conditional probability:

P(a and b) = P(a)P(b|a)

Prob(event 1) × Prob(event 2 given event 1).

1/6 • 4/11 = 4/66 = 2/33 or 0.0606. just a hair over 6% probability of the described sequence hapening.

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Between 10 P.M. and 7:54 A.M.​, the water level in a swimming pool decreased by 11/40 . Assuming that the water level decreased
xxMikexx [17]

Answer:

It approximately dropped 0.027777 per hour.

Step-by-step explanation:

First, we calculate the decrease.

Decrease = 11/40 = 0.275

Then,  we calculate the time interval.

From 10 pm to 7:54 hours will be 9.54 hours

Time interval= (9 + 54/60) hours

Time interval=9.9 hours

Finally, we calculate how much it dropped each hour

0.275/9.9 ≈ 0.027777

So it approximately dropped 0.027777 per hour.

7 0
1 year ago
Read 2 more answers
Can you help me with the bottom three please?
nika2105 [10]

Answer:

6= 66.67%

7=25%

8=70%

6 0
3 years ago
What is the property of y • 0 = 0
iragen [17]

Answer: The property of y x 0 = 0 is the Identity property.

Step-by-step explanation:

I hope this is what you were looking for, I apologize if I have been mistaken.

3 0
2 years ago
Which is true about the volume or surface area of these prisms?
GrogVix [38]
The correct answer is B- The surface area of B is greater than the surface area of A. I got this answer because...

Figure A's Volume= 60

Figure B's Volume= 60 

Figure A's Surface Area= 104

Figure B's Surface Area= 248

So because the volumes are the same I knew it was not C or D, and then I solved the Surface Area for figures a and b and knew the correct answer is B.

Hope that helps. :)

3 0
4 years ago
There are 12 people in a class. 10 are randomly chosen. How many possible combinations are there?
Mazyrski [523]

long way

12 x 11 x 10 x 9 x 8 x 7 x6 x5 x4 x3x2/ 10x9x8x7x6x5x4x3x2x


but you can shorten that by crossing out identical numbers so you get 12 x 11

12 x 11 = 132 combinations

3 0
3 years ago
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