Statistics help

Question

A bag contains 9 yellow marbles, 4 red marbles, and 5 white marbles. If two different marbles are drawn from the bag, what is the probability of drawing first a yellow marble and then a white marble?

Answer 1

18 total marbles. 9 yellow and 5 white.

First draw, probability 9/18 = 1/2 being yellow, leaving 17 marbles

Second draw, probability 5/17 being white

probability yellow, then white = 1/2 * 5/17 = 5/34.