Set Theorymedium
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If n(A)=20,n(B)=15,n(C)=10,n(AB)=8,n(BC)=5,n(AC)=4n(A) = 20, n(B) = 15, n(C) = 10, n(A \cap B) = 8, n(B \cap C) = 5, n(A \cap C) = 4 and n(ABC)=2n(A \cap B \cap C) = 2, what is n(ABC)n(A \cup B \cup C)?