SOLUTION: Let U be a universal set with disjoint subsets A and B; n(U) = 60, n(A) =25, and n(B) = 30. Find n((A U B)')

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Question 1013331: Let U be a universal set with disjoint subsets A and B; n(U) = 60, n(A) =25, and n(B) = 30. Find n((A U B)')
Answer by stanbon(75887) About Me  (Show Source):
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Let U be a universal set with disjoint subsets A and B; n(U) = 60, n(A) =25, and n(B) = 30. Find n((A U B)')
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Since A and B are disjoint n(AUB) = n(A)+n(B) = 25+30 = 55
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Suce n(U) = 60, n(AUB)' = 60-55 = 5
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Cheers,
Stan H.
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