A box contains 5 white balls and some black balls
A ball is taken from the box
a) What is the number of black balls If the probability of black ball is twice the probability of white balls

A box contains 6 black and 4 white balls If a ball is taken from it, what is the probability of it being black? And the probability of it being white?

In a bag there were'3 white balls and 5 black balls.From this one ball is taken,then :What is the probability of being black ball?

A bag contains 5 red balls, 3 black balls and 4 white balls. A ball is drawn out of the bag at random What is the probability that the ball drawn is white? Hence find the probability that the ball drawn is either red or white. find the probability that the ball drawn is either red or black.

One box contains 8 black balls and 12 white balls. Another box contains 9 black and 6 white balls. One ball is taken from each box at random.What is probability of getting both black? What is the probabilty of getting both white? What is the probability of getting one black and one white?

A bag contains 5 red balls, 3 black balls and 4 white balls. A ball is drawn out of the bag at random What is the probability that the ball drawn is white? Hence find the probability that the ball drawn is either red or white

A bag contains 5 white balls and 3 black balls. Two balls are drawn at random one after the other without replacement. Find the probability that the ball drawn first is white.

A bag contains 5 white balls and 3 black balls. Two balls are drawn at random one after the other without replacement. Find the probability that the first draw gives a white ball and the second draw gives a black ball

A box contains 5 white, 7 red and 8 black balls. If four balls are drawn by one with replacement what is the probability that None is white?

A box contains 5 white, 7 red and 8 black balls. If four balls are drawn by one with replacement what is the probability that All are white?

One bag contains 5 white and 3 black balls. Another bag contains 7 white and 8 black balls.A ball is transferred from the first bag to the second and then a ball is drawn from the second. Find the probability that the ball drawn from the second bag is white