One bag contains four white balls and three black and a second bag contains three white balls and five black balls. One ball is drawn from the first bag and placed unseen in the second bag. What is the probability that a ball now drawn from second bag is black ?

One bag contains 5 white balls and 3 black balls and a second bag contains 2 white balls and 4 black balls. One ball drawn from the first bag and placed unseen in the second bag. What is the probability that a ball now drawn from second bag is black?

One bag contains 5 white balls and 3 black balls and a second bag contains 2 white balls and 4 black balls.One ball drawn from the first bag and placed unseen in the second bag. What is the probability that a ball now drawn from second bag is black?

A bag contains 5 white and 4 black balls and another bag contains 7 white and 9 black balls. A ball is drawn from the first bag and two balls drawn from the second bag. What is the probability of drawing one white and two black balls ?

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

( for explanation of law of total probability ) there are two bags . The first bag contains 4 white and 5 black balls and the second bag contains 5 white and 4 black balls , two balls are drawn at random from the first bag and are put into the second bag without noticing their colours , then two balls are drawn from the second bag . find the probability that the balls are white and black.

A bag contains 3 black and 4 white balls. Second bag contains 5 black and 6 white balls. A ball is drawn at random from one of the bags and it is found to be black. What is the probability that this ball is drawn from second bag?

A bag contains 3 black and 4 white balls. Second bag contains 5 black and 6 white balls. A ball is drawn at random from one of the bags and it is found to be black. What is the probability that this ball is drawn from second bag?

A bag contains 4 white balls and 2 black balls. Another bag contains 3 white balls and 5 black balls. If one ball is drawn from each bag, find the probability that both are white.

A bag contians 4 white balls and 2 black balls. Another bag contains 3 white balls and 5 black balls. If one ball is drawn from each bag, find the probability that both are black.

There are two bags. The first bag contain 5 white and 3 black balls and the second bag contains 3 white and 5 black balls. Two balls are drawn at random from the first bag and are put into the second bag without noticing their colours. Then two balls, are drawn from the second bag then the probanility that the balls are one white and one black is -