Question

if n(AUB)=15,n(A)=10 and n(B)=5 then find n(AnB)​

Answer 1

Answer:

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

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