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OpenStudy (anonymous):
Suppose n(X) = 28 and n(Y) = 11.(a) What is the maximum number of elements X ∪ Y can have? (b) What is the minimum number of elements X ∪ Y can have?
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jimthompson5910 (jim_thompson5910):
hint: \[\Large n(X \cup Y) = n(X) + n(Y) - n(X \cap Y)\]
OpenStudy (dan815):
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