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

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 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 X be a set containing n elements.Two subsets A and B of X are chosen at random, the probability that A uu B=X is

Let X be a set containing n elements. Two subsets A and B of X are chosen at random, the probability that AuuB=X is

Let X be a set containing n elements. Two subsets A and B of X are chosen at random, the probability that AuuB=X is

Let X be a set containing n elements. Two subsets A and B of X are chosen at random, the probability that AuuB=X is

Let X be a set containing n elements. Two subsets A and B of X are chosen at random, the probability that AuuB=X is

S is a set containing n elements. If two subsets A and B of S picked at random from the set of all subset of S. Then the probability that A and B have no common element.