There are two boxes containing 5 white and 6 blue balls and 3 white and 7 blue balls respectively. If one of the boxes is selected at random and a ball is drawn from it, then the probability that the ball is blue is

There are two identical boxes containing respectively 5 white and 3 red balls, 4 white and 6 red balls. A box is chosen at random and a ball is drawn from it (i) find the probability that the ball is white (ii) if the ball is white, what is the probability that it from the first box?

A box $X$ contains 2 white and 3 black balls and another bag Y contains 4 white and 2 black balls. One bag is selected at random and a ball is drawn from it. Then the probability for the ball chosen be white is

There are two Urns. The first one contains 4 white and 6 blue balls and the other contains 4 white and 5 blue balls. One of the urns is selected at random and a ball is drawn. If the ball drawn is white, find the probability that it is drawn from the first urn.

There are two bags . One bag contains 3 white balls and 2 black balls . The other box contains 7 white and 3 balck balls , If a bag is selected at random and from it , then a ball is drawn then the probability that the ball is black 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 3 boxes with the following composition: Box I:7 Red +5 White +4 Blue balls: Box II 5 Red +6 White +3 Blue balls: Box III: 4 Red 3 White +2 Blue balls' One of the boxes is selected at random and a ball is drawn from it.What is the probability that the drawn ball is red?

A bag contains 6 red and 5 blue balls. One ball is drawn at random. The probability that the ball is blue is:

Bag A contains 1 white, 2 blue and 3 red balls. Bag B contains 3 white, 3 blue and 4 red balls. One bag is selected at random and then two balls are drawn from the selected bag. Find the probability that the balls drawn are white and red.

Boxes I and II contain respectively 4 white, 3 red and 3 blue balls, and 5 white, 4 red and 3 blue balls. If one ball is drawn from each box, what is the probability that both the balls are of the same colour ?