Question

There are 3 white balls, 7 red balls, and 5 green balls in a container. A ball is chosen at random. What is the probability of choosing a green ball , keeping it, and then choosing a red ball?

Answer 1

(p green) 1/3

(p red) = 1/2

Explanation:

Add the number of balls together to get the total.

3 + 7 + 5 = 15

Find the probability of choosing green.

(p green) = 5/15

reduce by 5

(p green) 1/3

Since you kept the green ball, there are now a total of 14 balls.

Find the probability of choosing red.

(p red) = 7/14

reduce by 7

(p red) = 1/2