There are two urns. Urn A has 3 distinct red balls and urn B has 9 distinct blue balls. From each urn two balls are taken out at random and then transferred to the other. The number of ways in which this can be done is (1) 36 (2) 66 (3) 108 (4) 3

An urn contains 4 white and 6 red balls.Four balls are drawn at random from the urn.Find the probability distribution of the number of white balls.

An urn contains 4 white and 6 red balls.Four balls are drawn at random from the urn.Find the probability distribution of the number of white balls.

There are two urns containing 5 red and 6 white balls and 3 red and 7 white balls respectively.If two balls are drawn from the first urn without replacement and transferred to the second urn and then a draw of another two balls is made from it,what is the probability that both the balls drawn are red?

An urn contains 10 balls, 4 red and 6 blue balls. A second urn contains 16 red balls and unknown number of blue balls. A ball is drawn from each urn. If the probability that both balls are of the same colour is 0.44, then the number of blue balls in the second urn is (A) 4 (B) 6 (C) 8 (D) 2

Threre are 9 red,7 white and 4 black balls in an urn. If two balls are selected at random what is the probability that one ball is white and the other ball is red ?

Threre are 9 red,7 white and 4 black balls in an urn. Two balls are drawn at random from the urn. What will be the probability that both the balls are red ?

An urn contains 4 white and 3 red balls. Three balls are drawn with replacement from this urn. Then, the standard deviation of the number of red balls/drawn is

There are two urns. The first urn contains 3 red and 5 white balls whereas the second contains 4 red and 6 white balls. A ball is taken at random from the first urn and is transferred to the second urn. Now another ball is selected at random from the probability that the second ball would be red is (A) 7/20 (B) 35/88 (C) 17/52 (d) 3/20