Question

If n(A)=12, n(B)=8, n(A∪B)=14 then n(A∩B)=?



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Answer 1

Answer:

Hence sum of no. of elements in A(n(A)) and no. of elements in B (n(B)) can be given as

n(A)+n(B)=n(AuB)+n(AnB)

Thus to find n(AnB)

n(AnB)=n(A)+n(B)-n(AuB)

=7+5-11

=12