Question

A bag contains 5 white marbles, 3 yellow marbles, and 2 black marbles. If you pull out a marble without replacing it, what is the probability of choosing a yellow and then black marble?

Answer 1

1/15

Explanation:

5+3+2 = 10

Chance of pulling out a yellow marble = 3/10

Once you pull out the marble there are 9 marbles left, 2 yellows, 2 blacks and 5 whites.

Chance of then pulling out a black marble = 2/9

3/10 x 2/9 = 6/90

6/90 = 1/15