Set S has 4 elements A and B are subsets of S. The probability that A and B are not disjoint is

Two sets A and B are not disjoint if :

Two sets A and B are disjoint iff

A is a set containing n elements. A subset P of A is chosen at random. The set A is reconstructed by replacing the elements of P. A subset Q is again chosen at random. The probability that P and Q are disjoint sets, is

A subset A of the set X={1,2,3,..,100} is chosen at random. The set X is reconstructed by replacing the elements of A, and another subset B of X is chosen at random. The probability that A cap B contains exactly 10 elements, is

Let X be a set containing 3 elements. If two subsets A and B of X are picked at random, the probability that A and B have the same number of elements is k then 1/k is______.

Let S={1,2,......,20} .A subset B of S is said to be nice ,if the sum of the elements of B is 204 . Then the probability that a randomly chosen subset of S is nice is (k)/(2^(18)) , where k is.

Two subsets A and B of a set containing n elements are chosen at random.The probability that A sube B is

Let X be a set containing n elements.If two subsets A and B of X are picked at random,the probability that A and B have the same number of elements is