A box contains 4 white and 6 red balls if 2 balls are drawn at random find the expectation of the number of red balls

An urn contains 9 red, 7 white, and 4 black balls if two balls are drawn at random the probability that both the balls are red is

A bag contains 5 white and 4 black balls.If 3 balls are drawn at random,find the probability that at least two of them are white.

A bag contains 5 white and 4 black balls. If 3 balls are drawn at random, find the probability that at least two of them are white.

A bag contains an assortment of blue and red balls. If two balls are drawn at random, the probability of drawing two red balls is five times the probability of drawing two blue balls. Furthermore, the probability of drawing one ball of each color is six time the probability of drawing two blue balls. The number of red and blue balls in the bag is a. 6,3 b. 3,6 c. 2,7 d. none of these

A box contains 7 white and 5 black balls two are drawn at random find the probability that they are not of the same colour when the balls are drawn at a time

A bag contains 2 white and 1 red balls. One ball is drawn at random and then put back in the box after noting its colour. The process is repeated again. If X denotes the number of red balls recorded in the two draws, describe X.

A box contains 7 white and 5 black balls. If 3 balls are drawn simultaneously at random with out replacement, what is the probability that they are not all of the same colour ?

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 bag contains 7 red and 5 white balls. 4 balls are drawn ar random. What is the probability that (i) all of them are red (ii) two of them would be red and two white?

An urn contains 4 red and 7 black balls. Two balls are drawn at random with replacement. Find the probability of getting (a) 2 red balls (b) 2 black balls (c ) one red ball and one black ball.