There are 10 bags `B_1, B_2, B_3,......,B_10` which contain `21, 22, ...., 30` different articles respectively. The total number of ways to bring out 10 articles J'from any one bag is

There are 31 in a bag is which 10 are identical,then then the number of ways of choosing 10 objects from bag is

There are two bags each containing 10 books all haing different titles but of the same size A student draws out any number of books from first bag as well as from the second bag. Find the probability that the difference between the number of books drawn from the two bags does not exceed two .

If the set A contains 7 elements and the set B contains 10 elements,then the number of one- one functions from A to B is

If the set A contains 7 elements and the set B contains 10 elements, then the number of one-one functions from A to B is

There are three bags B_(1),B_(2),B_(3),B_(1) contians 5 red and 5 green balls. B_(2) contains 3 red and 5 green balls and B_3 contains 5 red and 3 green balls, bags B_(1),B_(2) and B_(3) have probabilities 3/10, 3/10, and 4/10 respectively of bieng chosen. A bag is selected at randon and a ball is randomly chosen from the bag. then which of the following options is/are correct?

There are three bags B_(1), B_(2) and B_(3) . The bag B_(1) contains 4 red and 4 black balls, B_(2) contains 3 red and 4 black balls, B_(3) contains 4 red and 3 black balls. Bags B_(1), B_(2) and B_(3) have probabilities (1)/(6), (1)/(3) and (1)/(2) respectively of being chosen. A bag is selected at random and a ball is chosen at random from the bag. Then probability of getting a red ball is?

A bag contains n white and n red balls. Pairs of balls are drawn without replacement until the bag is empty. If the number of ways in which each pair consists of one red and one white ball is 14400, then n is: (A) 120 (B) 144 (C) 5 (D) 10