Question

If A and B two disjoint sets then (AΠB) is. Give answer options. (A) U. (B) Φ.(C) A. (D) none of these.

Answer 1

Answer:

Step-by-step explanation:

A and B are two disjoint sets.

∴ A∩B=ϕ ⟹ n(A∩B)=0

Since, n(A∪B)=n(A)+n(B)−n(A∩B)

                           =n(A)+n(B)−0=n(A)+n(B)

Hence, n(A∪B)=n(A)+n(B)