There are two identical urns containing respectively 6 black and 4 red balls, 2 black and 2 red balls. An urn is chosen at random and a ball is drawn from it.
(i) find the probability that the ball is black
(ii) if the ball is black, what is the probability that it is from the first urn ?

There are two identical boxes containing respectively. 6 black and 4 red balls, 2 black and 2 red balls. An urns is chosen at random and a ball is drawn from it (i)find the probability that the ball is black,(ii)if the ball is black,what is the probability that it is from the first urn?

There are two identical boxes containing respectively 5 white and 3 red balls, 4 white and 6 red balls. A box is chosen at random and a ball is drawn from it (i) find the probability that the ball is white (ii) if the ball is white, what is the probability that it from the first box?

There are two identical boxes. Box I contains 5 red and 4 black balls, while Box II contains 3 red and 3 black balls. A person chosen a box at random and takes out a ball a. Find the probability that the ball drawn is red. b. If the ball drawn is black, what is the probability that it is drawn from Box II.

BOX A contains 6 white balls and 4 red balls.BOX B contains 5 white balls and 5 red balls.One of the boxes is chosen at random and two balls are drawn from it . Find the probability that both balls are red balls .

An urn contains 10 red and 8 white balls. One ball is drawn at random. Find the probability that the ball drawn is white .

A bag contains 2 red balls and 6 black balls. A ball is drawn at random from the bag. What is the probability that the ball drawn is not red?