Ononot — If n(A) = 15, n(B) = 20, and n(A \cap B) = 5, what is the nu

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Set Theoryhard

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If $n(A) = 15$ , $n(B) = 20$ , and $n(A \cap B) = 5$ , what is the number of elements in the set of all subsets of $A$ that are NOT subsets of $B$ ?