An urn contains 2 white and 2 black balls .A ball is drawn at random.If it is white ,it is not replace into urn ,otherwise it is replaced along with another ball of the same colour .the process is repeated , then find the probabiltiy that the third ball drawn is black.

An urn contains 2 white and 3 black balls a ball is drawn at random it is white it isn't replace into the urn otherwise it is replaced along with another ball of same colour the process is repeated find probability that third ball is white

An urn contains m white and n black balls. A ball is drawn at random and is put back into the urn along with k additional balls of the same colour as that of the ball drawn. A ball is again drawn at random. What is the probability that the ball drawn now is white ?

An urn contains 5 white and 3 black balls and 4 balls are drawn at random.The probability of getting white and black balls equal in number is-

An urn contains m white and n black balls.A ball is drawn at random and is put back into the urn along with k balls of the same colour as that of the ball drawn.a ball is again drawn at random.Show that the probability of drawing a white ball now does not depend on k.

An urn contains 4 white and 3 red balls.Three balls are drawn at random from the urn with replacement.Find the probability distribution of the number of red balls.

An urn contains 5 red and 6 black balls. A ball is drawn at random, its colour is noted and is returned to the urn. Moreover, 2 additional balls of the colour drawn are put in the urn and then a ball is drawn at random. What is the probability that the second ball is red ?

An urn contains 10 red and 8white balls.One ball is drawn at random.Find the probability that the ball drawn is white.

An urn contains 9 red,7 white and 4 black balls.If two balls are drawn at random,find the probability that: (i) both the balls are red, (ii) one ball is white (iii) the balls are of the same colour (iv) one is white and other red.