Three urns contains 3 white and 2 black, 2 white and 3 black and 1 black and 4 white balls respectively. A ball is picked from any urn at random. What is the probability that the ball is white?

If three boxes containing 3 white and 1 black, 2 white and 2 black, 1 white and 3 black balls respectively, one ball is drawn at random, find the probability that the ball is black.

A bag X contains 3 white and 2 black balls; another bag Y contains 2 white and 4 black balls. A bag and a ball out of it is picked at random. What is the probability that the ball is white?

A bag X contains 3 white and 2 black balls; another bag Y contains 2 white and 4 black balls.A bag and a ball out of it is picked at random.What is the probability that the ball is white?

A bag A contains 3 white and 2 black balls and another bag B contains 2 white and 4 black balls. A bag and a ball out of it are picked at random. What is the probability that the ball is white?

A bag A contains 3 white and 2 black balls and another bag B contains 2 white and 4 black balls. A bag and a ball out of it are picked at random. What is the probability that the ball is white?

A bag A contains 3 white and 2 black balls and another bag B contains 2 white and 4 black balls. A bag and a ball out of it are picked at random. What is the probability that the ball is white?

Three urns respectively contain 3 white and 2 black, 2 white and 3 black, and 1 white and 4 black balls. One ball is drawn from each urn. Find the probability that the selection contains 1 black and 2 white balls.

A urn contains 9 red, 7 white and 4 black balls. A ball is drawn at random. What is the probability that the ball drawn will be: white.