(A) Given that n(A')=20, n(B')=40, n(A'∪B')=50, n(∪)=80, find A ∩B (B)  Given that n(A')=70, n(B')=170, n(A'∩B')=40, n(∪)=300, find A∩B

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A: This question is related to linear transformation . See 2nd step.

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