An urn contains 5 red and 5 black balls. A ball is drawn at random, its colour is noted and is returned to the urn. Moreover, 2 additional balls of the colour drawn are put in the urn and then a ball is drawn at random. What is the probability that the second ball is red?

A box contains 5 red and 10 black balls. A ball is drawn at random, its colour is noted and is returned to the box. More over 2 additional balls of the colour drawn are put in the box and then a ball is drawn.what is the probability that the second ball is red.

An urn contains 4 black. 5 rvhite and 6 red balls. one ball is drawn at random. The probability that it is not black is

A bag contains 8 red and 5 white balls.Three balls are drawn at random.Find the probability that all the three balls are red.

A bag contains 6 red and 12 green balls. two balls are drawn. What is the probability that one is red and other is green?

A bag contains 8 red and 5 white balls.Three balls are drawn at random. Find the probability that all the three balls are 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. find the probability that the ball drawn is either red or black.

A bag contains 8 red and 5 white balls.Three balls are drawn at random.Find the probability that one ball is red and two balls are white.

A bag contains 9 balls of which 4 are red,3 are white,and 2 are green. If a ball is drawn at random,then, Calculate the probability that it is not white.