A bag contains 5 white and 7 black balls,3 balls are drawn at random.Find the probability that (i)all are white,(ii)one white and two black.

A bag contains 7 white and 9 black balls. If a ball is drawn at random, what is the probability that it is white?

A bag contains 6 white ., 7 red and 5 black balls . Three balls are drawn at random . Find the probability that they will be white .

A bag contain n white and n black balls, all of equal size. Balls are drawn at random. Find the probability that there are both white and black balls in the draw and that the number of white balls is greater than that of black balls by 1.

A bag contain n white and n black balls, all of equal size. Balls are drawn at random. Find the probability that there are both white and black balls in the draw and that the number of white balls is greater than that of black balls by 1.

A bag contain n white and n black balls, all of equal size. Balls are drawn at random. Find the probability that there are both white and black balls in the draw and that the number of white balls is greater than that of black balls by 1.

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

A bag contains 5 white, 7 blacks and 4 red balls,3 are drawn at random . The probability that all the three balls are white is

A bag contains 4 white and 2 black balls.Another bag contains 3 white and 5 black balls.If one ball is drawn from each bag.Find the probability that One is white and one is black.