A set 'S' contains `7` elements. A non-empty subset A of S and an element 'x' of S are chosen at random. Then the probability that `x in A` is

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

Suppose A is a set containing n elements. Two subsets P and Q of A are chosen at random. If the probability that P is a subset of Q is 243/1024, then n is equal to

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.