Question

Two urns contain white balls and yellow balls. The first urn contains 4 white balls and 4 yellow balls and the second urn contains 4 white balls and 8 yellow balls. A ball is drawn at random from each urn. What is the probability that both balls are white

Answer 1

the probability is 2/40 but do NOT simplify

Answer 2

P(white ball) first drawn:
4/8 or 1/2
P(white ball) second drawn:
4/12=1/3
As a result, the probability that both balls are white is 1/6. Hope it help!