Mathematics, 31.07.2019 05:20 anhekb

Let a and b be two finite sets such that n(a) = 20, n(b) = 28 and n(a ∪ b) = 36, find n(a ∩ b)

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Let a and b be two finite sets such that n(a) = 20, n(b) = 28 and n(a ∪ b) = 36, find n(a ∩ b)...

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