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posted by keke on Friday, August 10, 2012 at 3:46pm.
If the universal set U is defined by U = {1, 2, 3, 4, 5, 6, 7, 8, 9, 10} and A = {1, 2, 3, 4 } B = {3, 4, 5, 6, 7} What is n(A ∩ B) ?
what elements are in both A and B? {3,4}
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