Two urns contain white balls and yellow balls. The first urn contains 2 white balls and 7 yellow balls and the second urn contains 10 white balls and 4 yellow balls. A ball is drawn at random from each urn. What is the probability that both balls are w?
2/21
10/63
12/23
1/20
2/21
10/63
12/23
1/20
1 Answer
Apr 13, 2017
The first must be white and the second must be white.