Each of the two identical bags contain 5 white and 5 red ball:s. One ball is transferred at random without notice from the second bag to the first bag. Then one ball is drawn from the first bag. Find the probability that the ball drawn is a red bail.

Each of the two identical bags contain 5 white and 5 red balls. One ball is transferred at random without notice from the second bag to the first bag. Then one ball is drawn from the first bag. Find the probability that the ball drawn is a red ball.

Bag A contains 5 red and 7 blue balls, while the other bag B contains 7 red and 5 blue balls. A ball is transferred (without noticing its colour) from the bag A to the bag B. Then a ball is drawn from the bag B. Find the probability that the ball drawn is blue.

A bag contains 9 red and 12 white balls one ball is drawn at random. Find the probability that the ball drawn is red.

A bag contains 9 red and 12 white balls. One ball is drawn at random. Find the probability that the ball drawn is red.

There are two bags. One bag contains six green and three red balls. The second bag contains five green and four red balls. One ball is transferred from the first bag to the second bag. Then one ball is drawn from the second bag. Find the probability that it is a red ball.

A bag contains 4 white and 5 red balls. Second bag contains 6 white and 3 red balls. A ball is transferred from first bag to second and then a ball is drawn from the second bag. Find the probability that this ball drawn is red.

A bag ccontains 4 white and 5 red balls. Second bag contains 6 whilte and 3 red balls. A ball is transferred from first bag to second and then a ball is drawn from the second bag. Find the probability that this ball drawn is red.