An urn contains 4 white and 3 Red balls. Find the probability distribution of the number of red balls in three draws when a ball is drawn at random with replacement . Also find its mean and variance.

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

A bag contains 3 red , 3 white and 3 green balls. One ball is taken out of the bag at random. What is the probability that the ball drawn is - red.

A bag contains 3 red, 3 white and 3 green balls. One ball is taken out of the bag at random. What is the probability that the drawn is red

A bag contains 3 red, 3 white and 3 green balls. One ball is taken out of the bag at random. What is the probability that the drawn is not red

A bag contains 3 red, 3 white and 3 green balls. One ball is taken out of the bag at random. What is the probability that the drawn is either red or white.

An urn contains 5 red and 2 green balls. A ball is drawn at random from the urn. If the drawn ball is green, then a red ball is added to the urn and if the drawn ball is red, then a green ball is added to the urn, the original ball is not returned to the urn. Now, a second ball is drawn at random from it. The probability that the second ball is red is

Urn A contains 6 red and 4 black balls and urn B contains 4 red and 6 black balls. One ball is drawn at random from urn A and placed in urn B. Then, one ball is drawn at random from urn B and placed in urn A. If one ball is drawn at random from urn A, the probability that it is found to be red, is....

A bag contains 3 red , 3 white and 3 green balls. One ball is taken out of the bag at random. What is the probability that the ball drawn is - either red or white.

Two balls are drawn at random with replacement from a box containing 10 black and 8 red balls. Find the probability that i both balls are red. ii. first ball is black and second is red. ii. one of them black and other is red.