A bag contains 3 red balls bearing one of the numbers 1, 2 or 3 (one number on one ball) , and 2 black balls bearing the numbers 4 or 6. A ball is drawn, its number is noted and the ball is replaced in the bag. Then another ball is drawn and its number is noted. Find the probability of drawing: 2 on the first draw and 6 on the second draw.

A bag contains 3 red balls bearing one of the numbers 1, 2 or 3 (one number on one ball) , and 2 black balls bearing the numbers 4 or 6. A ball is drawn, its number is noted and the ball is replaced in the bag. Then another ball is drawn and its number is noted. Find the probability of drawing: a total of 5.

A bag contains 3 red balls bearing one of the numbers 1, 2 or 3 (one number on one ball) , and 2 black balls bearing the numbers 4 or 6. A ball is drawn, its number is noted and the ball is replaced in the bag. Then another ball is drawn and its number is noted. Find the probability of drawing: a number le 2 on the first draw and 4 on the second draw.

A bag contains 5 black and 3 white balls. Two balls are drawn at random. Find the probability of drawing two black balls.

A bag contains 5 black and 3 white balls. Two balls are drawn at random. Find the probability of drawing two white balls.

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.