A bag has 3 red rocks, 4 green rocks, 3 blue rocks, 3 speckled rocks,

and 4 yellow rocks. You randomly pull a rock from the bag, put it

back, and then pull out another one.

What is the probability of getting a green and then a red?

Answer: 12/17

Step-by-step explanation:

This is an example of probability with replacement

n (red) = 3

n (green) = 4

n (blue) = 3

n (speckled) = 3

n (yellow) = 4

Total = 17

The probability of getting a green = number of green / total number

That is

p (green) = 4/17

Also

p (red) = 3/17

" and " in probability means multiplication, therefore:

the probability of getting a green and then a red will be

4/17 x 3/17 = 12/17

3/17 or 17.64%