There are 10 black balls in a box. A person picks 5 balls from the box, paints them white and puts them back into the box.Now the person picks 5 balls from the box at random. The probability that exactly 3 of these 5 balls are white is

A box contains 6 red, 4 white and 5 black balls. A person draws 4 balls from the box at random. Find the probability that among the balls drawn there is atleast one ball of each colour.

A box contains 6 red,4 white and 5 black balls.A person draws 4 balls from the box at random.Find the probability that among the balls drawn there is atleast one ball of each colour.

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?

A box contains 3 blue, 2 white and 4 red balls. If A ball is drawn from the box what is the probability that the ball is not white.

There are two boxes. In the first box there are 4 white, 5 black balls. In the second box there are 5 white, 4 black balls. A ball at random is drawn from the first box and transferred to the second box. Then if a ball is drawn at random from the second box, the probability for the drawn ball to be white is

A box contains 6 white balls and 4 black balls, A ball is drawn at random from the box. What is the probability that the ball is white.

A box contains 7 red, 3 white and 2 black balls, when a ball is picked up at random from the box find the probability that, i) It is red ii) it is not red

A box contains 5 blue and 4 white balls. A person select two balls randomly from it. The probability that both the balls are of same colour is .....

Box A has 3 white and 2 red balls, box B has 2 white and 4 red balls. If two balls are selected at random without replacements from the box A and 2 more are selected at random from B, the probability that all the four balls are white is

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