Box A contains 5 red, 3 white and 8 blue balls while box B contains 3 red and 5 white balls. A fair dice is tossed. If 2 or 4 appears, a ball is chosen from B, otherwise a ball is chosen from A. Then the probability that the chosen ball is red.

Box -I contains 6 red and 3 white balls while box -II contains 4 red and 3 white balls.A fair dice is thrown.If it turns up a multiple of 3.a ball is drawn from box-I else a ball is drawn from box II.Find the probability that the ball drawn is white.

Box -I contains 5 red and 2 blue balls while box - II contains 2 red and 6 blue balls.A fair coin is tossed.If it turns up head,a ball is drawn from box-l,else a ball is drawn from box-I.Find the probability of each of the following ( i) A red ball is drawn (ii) Ball drawn is from box-I if it is blue

A bag contains 2 red and 3 white balls and another bag contains 1 red and 2 white balls. If a bag is chosen at random and a ball is drawn from it, what is the probability that the ball is white ?

A box contains 7 red , 6 white and 4 blue balls. Number of ways of selection of three red balls is

Given two bags A and B as follows : Bag A contains 3 red and 2 white balls and bag B contains 2 red and 5 white balls. A bag is selected at random, a ball is drawn and put into the other bag, then a ball is drawn from the second bag. The probability that both balls drawn are of the same colour is

Given two bags A and B as follows : Bag A contains 3 red and 2 white balls and bag B contains 2 red and 5 white balls. A bag is selected at random, a ball is drawn and put into the other bag, then a ball is drawn from the second bag. The probability that both balls drawn are of the same colour is

Bag A contains 5 red and 7 blue balls, while the other bag B contains 7 red and 5 blue balls. A ball is transferred (without noticing its colour) from the bag A to the bag B. Then a ball is drawn from the bag B. Find the probability that the ball drawn is blue.

A bag A contains 2 white and 3 red balls another bag B contains 4 white and 5 red balls.A bag is chosen at random and a ball is drawn from it.If the ball drawn is red,what is the probability that the bag B is chosen? [CBSE'04C)

A bag contains 6 red and 4 green balls. A fair dice is rolled and a number of balls equal to that appearing on the dice is chosen from the urn at random. The probability that all the balls selected are red is

4 12. Three indentical boxes contain red and white balls. The first box contains 3 red and 2 white, the second box 4 red and 5 white and the third box 2 red and 4 white balls. A box is chosen at random and a ball is drawn from it. If the drawn ball is red, what is the probability that the second box is chosen? the is 06] rn t ite