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Set Theoryhard
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If n(U)=50,n(A)=20,n(B)=15n(U)=50, n(A)=20, n(B)=15n(U)=50,n(A)=20,n(B)=15 and A,BA, BA,B are disjoint, what is n((A∪B)′)n((A \cup B)')n((A∪B)′)?