Question: A universal set U consists of 21 elements. If sets A, B, and C are proper subsets of U and n(U)=21, n(AB)=n(AC)=n(BC)=10,n(ABC)=6,and n(ABC)=18,determine each of

A universal set U consists of 21 elements. If sets A, B, and C are proper subsets of U and n(U)=21, n(AB)=n(AC)=n(BC)=10,n(ABC)=6,and n(ABC)=18,determine each of the following.

a) n(AB)

b) n(AC)

c) n(AB)

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