Two bags contain : 4 red and 4 black. 2 red and 6 black balls One ball is drawn at random from one of the bags and found to be red. Find the probability that it was drawn from the second bag.

Two bags contain 6 red and 4 black, 3 red and 3 black balls. One ball is drawn at random from one of the bags and found to be red. Find the probability that it was drawn from the second bag.

Two bags contain 6 red and 3 black, 5 red and 5 black balls. One ball is drawn at random from one of the bags and found to be red. Find the probability that it was drawn from the second bag.

Bag I contains 6 red and 4 black balls while another bag II contains 2 red and 6 black balls. One ball is drawn at random from one of the bags and found to be red. Find the probability that it was drawn from bag II.'

A bag A contains 2 white and 3 red balls and a bag B contains 4 white and 5 red and balls. One ball is drawn at random from one of the bags and is found to be red. Find the probability that it was drawn from bag B.

Bag I contains 3 red and 4 black balls while another Bag II contains 5 red and 6 black balls. One ball is drawn at random from one of the bags and it is found to be red. Find the probability that it was drawn from Bag II.