A universal set U consists of 15 elements. If sets A, B, and Care proper subsets of U and n(U) = 15, n(AB) = n(An C) = n(BNC)=7, n( ABC) = 4, and n(A
UBU C) = 13, determine each of the following.
a) n(AUB)
b) n(AUC)
c) n(
AB)

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