Let A and B be two sets such that n(A) = 3 and n(B) = 2.

A is the set of all first entries in ordered pairs in A × B and B is the set of all second entries in ordered pairs in A × B.

Also,

n(A) = 3 and n(B) = 2

∴ A = {x, y, z} and B = {1, 2}