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OpenStudy (anonymous):
Please help with this multiple choice question for a finite course in college... Let U={1,2,3,b,c,y,z} be a universal set with subsets Y={1,b,c,y}, X={c,y,z}, and A={1,2,c,z}. Another subset of U is given by S={z}. Which of the following sets are needed to express the set {S}? Choices: A. A B. Y C. X D. A' E. Y' F. X'
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