if A and B are two disjoint sets then n (A U B) is equal to n(A) + n(B) how ???? explain Share with your friends Share 2 Rishabh Mittal answered this Dear Student, nA∪B=nA+nBBecause for disjoint sets nA∩B=ϕ. 4 View Full Answer Rashmika B answered this n(AUB)=n(A)+n(B)-n(AinB) fr disjoint sets n(AinB)=null set therefore n(AUB)=n(A)+n(B) -1
