A bag contains 1 red and 3 white balls. Find the probability distribution of the number of red balls if 2 balls are drawn at random from the bag one-byone without replacement.

A bag contains 4 red and 6 black balls.Three balls are drawn at random.Find the probability distribution o the number of red balls.

Find the probability distribution of the number of green balls drawn when 3balls are drawn, one by one,without replacement from a bag containing 3 green and 5 white balls.

Find the probability distribution of the number of white balls drawn in a random draw of 3 balls without replacement,from a bag containing 4 white and 6 red balls.

A bag contains 9 red and 12 white balls. One ball is drawn at random. Find the probability that the ball drawn is red.

An urn contains 3 white and 6 red balls.Four balls are drawn one by one with replacement from the urn.Find the probability distribution of the number of red balls drawn.Also find mean and variance of the distribution.

A bag A contains 2 white and 3 red balls and a bag B contains 4 white and 5 red and balls. One ball is drawn at random from one of the bags and is found to be red. Find the probability that it was drawn as red.

A bag A contains 2 white and 3 red balls and a bag B contains 4 white and 5red balls. One ball is drawn at random from one of the bags and is found to be red. Find the probability that it was drawn as red.

There are two bags I and II. Bag I contains 4 white and 3 red balls while another Bagt II contains 3 white and 7 red balls. One ball is drawn at random from one of the bags and it is found to be white. Find the probability that it was drawn from bag I.