Question

if A andB are any two disjoint sets such that n(A)=20,n(B)=15,find n(AUB) and n(AnB)
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Answer 1

Answer:

n(A⋃B)=25

Step-by-step explanation:

Given that, A and B are two disjoint sets

n(A)=15 and n(B)=10

Then,

n(A⋂B)=0 becauseA and B both are disjoint

n(A⋃B)=n(A)+n(B)−n(A⋂B)

n(A⋃B)=15+10−0

n(A⋃B)=25

Hence, this is the answer.