A bag contains some white and some black balls, all combinations of balls being equally likely. The total number of balls in the bag is 10. If three balls are drawn at random without replacement and all ot them are found to be black, the probability that the bag contains 1 white and 9 black balls is

A bag contains some white and some black balls, all combinations of balls being equally likely. The total number of balls in the bag is 10. If three ball are drawn at random without replacement and all of them are found to be black, the probability that the bag contains 1 white and 9 black balls is 14//55 b. 12//55 c. 2//11 d. 8//55

A bag contains some white and some black balls, all combinations of balls being equally likely. The total number of balls in the bag is 10. If there ball are drawn at random without replacement and all of them are found to be black, the probability that eh bag contains 1 white and 9 black balls is 14//55 b. 12//55 c. 2//11 d. 8//55

A bag contains some white and some black balls, all combinations being equally likely. The total number of balls in the bag is 12. Four balls are drawn at random from the bag at random without replacement and all of them are found to be Black, then the probability that the bag contains 1 white and 9 black balls is

A bag contains 4 black and 3 white balls. If two balls are drawn at random without replacement, what is the probability that both balls have each color?

. A bag contains n white, n black balls. Pair of balls are drawn without replacement until the bag is empty. Then Find the probability that each pair consists of one white and one black ball is

A bag contains 4 red and 4 black balls, another bag contains 2 red and 6 black balls. One of the two bags is selected at random and two balls are drawn at random without replacement from the bag and are found to be both red. Find the probability that the balls are drawn from the first bag.

A bag contains 4 white balls and 3 black balls. If two balls are drawn at random, then mean of number of white balls is

A bag contains 10 white and 15 black balls. Two balls are drawn in succession without replacement. What is the probability that first is white and second is black?

A bag contains 4 balls. Two balls are drawn at random, and are found to be white. What is the probability that all balls are white?

A bag contains 4 balls. Two balls are drawn at random, and are found to be white. What is the probability that all balls are white?