If B is an empty set, then n(B)>0.
If A and A∩B are void set (empty sets) and n(A∪ B) = 50, find the value of n(B).
If ∅ is an empty set, then ∅′=
Let A and B be two non empty sets such that n(A)=5, n(B)=6 and n(A∩B)=3.
Find (i) n(A×B),
(ii) n(B×A) and
(iii) n(A×B)∩(B×A)
If P = {Triangles with 4 sides} then set P is an empty set