There are 4 red, 3 black and 5 white balls in a bag. Find the number of ways of selecting three balls, if at least one black ball is there.

There are 4 white, 3 black and 3 red balls in a bag. Find the number of ways of selecting three balls, if at least one black ball is there.

There are 4 white, 3 black and 3 red balls in a bag. Find the number of ways of selecting three balls, if at least one black ball is there.

There are 5 red, 4 black and 3 white in a bag. Three balls are drawn one by one without replacement find the probability that all three balls are red.

A bag contains 4 red, 3black and 2 white balls. If 3 balls are selected at random, the probability of selecting atleast one white ball is

In a bag there are 5 red balls, 3 white balls and 4 black balls. Four balls are drawn from the bag. Find the number of ways in which at most 3 red balls are selected?

A bag has white, black, and red balls. A ball is drawn at random from the bag. The probability of getting a white ball is 3/(10) and that of a black ball is 2/5 . Find the probability of getting a red ball. If the bag has 20 black balls, find the total number of balls in the bag.

A bag contains 4 red, 6 black and 5 white balls, A ball is drawn at random from the bag. Find the probability that the ball drawn is: not black

A bag contains 4 red, 6 black and 5 white balls, A ball is drawn at random from the bag. Find the probability that the ball drawn is: red or black

A box contains two white balls, three black balls and four red balls. The number of ways in which three balls can be drawn from the box so that least one of the balls is black is :