Box A contains 2 black and 3 red balls while box B contains 3 black and 4 red balls. Out of the setwo boxes one is selected at random and the probability of choosing box A is double that of box B. If a red ball is drawn from the selected box, then the probability that it has come from box B is

Box A contains 2 black and 3 red balls, while box B contains 3 black and 4 red balls . Out of these two boxes one is selected at random, and the proability of choosing box A is double that of box B. if a red ball is drawn from the selected box then the proability that is has come from box B is

Box A contains 2 black and 3 red balls, while box B contains 3 black and 4 red balls. Out of these two boxes one is selected at random, and the probability of choosing box A is double that of the probability of choosing box B. If a red ball is drawn from the selected box then find the probability that it has come from box B.

A box contains 3 red, 4 black and 5 white balls. Three balls are drawn at random. Then the probability of 2 white balls and 1 red ball is

A box contains 3 red and 7 white balls. One ball is drawn at random and in it placed a ball of the other colour is placed in the box. Now if one ball is drawn at random from the box then the probability that it is a red ball is

BOX A contains 6 white balls and 4 red balls.BOX B contains 5 white balls and 5 red balls.One of the boxes is chosen at random and two balls are drawn from it . Find the probability that both balls are red balls .

There are two identical boxes. Box I contains 5 red and 4 black balls, while Box II contains 3 red and 3 black balls. A person chosen a box at random and takes out a ball a. Find the probability that the ball drawn is red. b. If the ball drawn is black, what is the probability that it is drawn from Box II.

A box contains 3 balck and 4 red balls. Another box contains 2 black and 3 red balls, Balls are taken from these boxes, mixed and kept in a third box. Now two balls are chosen from the third box at random. What is the probability that one of them is black and the other red?