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Mathematics, 01.11.2020 14:00 nicoleamor

If n(A) = p, n(B) = q and n(A∪B) = r, find n(A∩B) in terms of p, q and r. ?

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If n(A) = p, n(B) = q and n(A∪B) = r, find n(A∩B) in terms of p, q and r. ?...
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