The probability of drawing two red balls in succession from a bag containing 3 red balls and 4 black balls when the ball that is drawn is replaced is

The probability of drawing 2 red balls in succession from a bag containing 4 red balls and 5 black balls when the ball that is drawn first is not replaced is

The probability of drawing two black balls in successsion from a bag containing 4 red and 3 black balls when the ball that is drawn first is replaced is

Find the probability of drawing 2 red balls in succession from a bag containing 4 red balls and 5 black balls when the ball that is drawn first is (i) not replaced (ii) replaced.

Find the probability of getting both red balss, when from a bag containing 5 red and 4 black balls, two balls are drawn without replacement.

A bag contains 3 red,4 white and 7 black balls.The probability of drawing a red or a black ball is

from a bag containing 4 red and 2 black balls, two balls are drawn. the probability of getting two black balls is:

Two balls are drawn in succession without replacement from an urn containing four red balls and three black balls. Let X be the possible outcomes drawing red balls. Find the probability mass function and mean for X.

There are 5 red and 4 black balls in a bag. The probability of drawing a red ball is: