Two balls are drawn at random from a bag containing 6 red and 4 green balls, find the probability that both ball are of same colour.

If two balls are drawn from a bag containing three red balls and four blue balls, find the probability that (a) They are of the same colour (b) They are of different colours

From a bag containing 4 red and 2 white balls two balls are drawn. The probability that both the balls are red is:

A bag contains 4 red and 5 black balls, a second bag contain 3 red and 7 black balls. One ball is drawn at random from each bag, find the probability that the ball are of the same colour.

A bag contains 4 red and 5 black balls, a second bag contain 3 red and 7 black balls. One ball is drawn at random from each bag, find the probability that the ball are of the same colour.

Two balls are drawn at random from a bag containing 2 white, 3 red, 5 green and 4 black balls, one by one without, replacement. Find the probability that both the balls are of different colours.

From a bag containing 2 white and 6 green balls, a ball is drawn at random. The probability of not a green ball is :

A bag contains 4 red and 5 black balls, a second bag contain 3 red and 7 black balls. One ball is drawn at random from each bag, find the probability that the balls are of different colour.

A bag contains 4 red and 4 black balls,another bag contains 2 red and 6 black balls.One of the two bags is selected at random and two balls are drawn at random without replacement from the bag and are found to be both red.Find the probability that the balls are drawn from the first bag.