A and B are finite sets such that n(A)=17 and n(B)=29. If A is a subset of B, then, n((A∪B)−(A∩B))= ___ .
If there are two sets A and B such that n(¯A∩¯B)=n(A∩B). Universal set contains 'x' elements. Then n (A) + n (B) is