A box contains m black balls and n red balls. All the balls except for one ball are drawn from it. Then the probability that the last ball remaining in the box is black is

Statement-1 : An urn contains m white and n black balls. All the balls except for one ball, are draw from it. The probability that the last ball remaining in the urn is white is equal to m/(m+n) . Statement-2 : An urn contains m white balls and n black balls. Balls are drawn one by one till all the balls are drawn. The probability that the second drawn ball is white is n/(m+n) . Statement-3 : An urn contains 6 balls, 3 white and 3 black ones, a person selected at random an even number of balls (all the different ways of drawing an even number of balls are considered equally probable, irrespective of their number). Then the probability that there will be the same numberof black and white balls among them is 11/15 .

There are 5 black and 6 red balls in a bag. If 3 balls are drawn at random, find the probability that these balls are black.

Balls are drawn one-by-one without replacement from a box containing 2 black, 4 white and 3 red balls till all the balls are drawn. Find the probability that the balls drawn are in the order 2 black, 4 white and 3 red.

Balls are drawn one-by-one without replacement from a box containing 2 black, 4 white and 4 rd balls till all the balls are drawn. Find the probability that the balls drawn are in the order 2 black, 4 white and 3 red.

A box contains 7 red balls and 6 blue ball. A ball is drawn at random from the box .The probability that this drawn is a blue ball.

A bag contains 3 red balls and 5 black balls. A ball is drawn at random from the bag. What is the probability that the ball drawn is: red (b) black

A bag contains 5 white balls, 7 red balls, 4 black balls and 2 blue balls. One ball is drawn at random from the bag. Find the probability that the balls drawn is red or black

A bag contains 5 black, 7 red and 3 white balls. A ball is drawn from the bag at random. Find the probability that the ball drawn is : (i) red (ii) black or white (iii) not black.

A bag contains 4 black balls and 6 red balls. One ball is drawn at random.The probability that it is red is