1.

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 of A is again chosen at random. Find the probability that P nn Q contains exactly two elements

Answer»


ANSWER :`.^(n) C_(2) (3^(n-2))/(4^(n))`


Discussion

No Comment Found

Related InterviewSolutions