Question

let A
and B be two infinite sets such that n(A)=20,n(B) =28 and
n (AUB) = 36,find n(AnB)
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Answer 1

Answer:

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Answer 2

Answer:

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

n(AnB) = 20 + 28 - 36

n(AnB) = 12