There are 25 elements in a universal set. If n(A) = 14, n(B) = 15 and n (A∩ B) = 6, what is the number of elements in A union B, n (A∪ B) =?
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There are 25 elements in a universal set. If n(A) = 14, n(B) = 15 and n (A∩ B) = 6, what is the number of elements in A union B, n (A∪ B) =?
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