Asked by cortnie

Two urns each contain yellow balls and black balls. Urn 1 contains 2 yellow balls and 6 black balls. urn2 contains 2 yellow balls and 5 black balls. A ball is drawn from each urn. What is the probability that both balls are yellow?

Please show me how do do this math problem.
Answered by drwls
The "events" of drawing a yellow ball from each urn are independent, so you multiply the probabilities of each.
They are 2/8 = 1/4 for the first urn and 2/7 for the second urn. The "joint probability" is therefore
(1/4)*(2/7)= 2/28 = 1/14
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