A box contains 5 black and 5 red balls. The balls are randomly picked one after another from the box, with out replacement . The probability of both balls being rad is?

A box contains 5 black, 4 white and 6 red balls. Two balls are drawn one after another without replacement. What is the probability that the first will be white and the second will be balck ?

A box contains 20 red and 15 black balls. Two balls are drawn from the box one after the other without replacement. What is the probability that both drawn balls are red ?

A box contains 20 red and 15 black balls. Two balls are drawn from the box one after the other without replacement. What is the probability that both drawn balls are red ?

(i) An urn contains 7 red and 3 black balls. Two balls are drawn one after another without replacement. What is the probability that the second ball is red if it is know that the first ball drawn is red. (ii) A box contains 8 red and 10 green balls. Two balls are drawn one after another without replacement. What is the probability that the second ball is green if it is know that the first ball drawn is red.

A box contains 3 white and 2 black balls. Two balls are drawn at random one after the other. If the balls are not replaced. what is the probability that both the balls are black ?

There are 6 red and 5 black balls in a bag.Two balls are drawn at random one after another with replacement.The probability that both the balls drawn may be red is

A box contains 3 red and 4 blue balls. Two balls are drawn one by one without replacement. Find the probability of getting both balls red.

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

A box contains 3 red, 4 black and 5 white balls. Three balls are drawn at random. Then the probability of 2 white balls and 1 red ball is