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4. Suppose A and B are two sets and n (AUB) = 42, n(A) = 38, and n(ANB) = 8. Find n(B). (A) 36 (B) 30 (C)4 (D) 46 (E) 12
14. For two cvents we have Pr[A]= 29, Pr[B]=43, and Pr[AUB]= 65. Find Pr[ANB). (a) .27 (b) .07 (c) .16 (d) .43 (e) .08 (f) none of the others
1. Let A and B be two subsets of some universal set. Prove that if (AUB) = AUB, then A=B.
