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Home  >>  AIMS  >>  Class11  >>  Math  >>  Sets
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If S and T are two sets such that S has 21 elements, T has 32 elements, and S $ \cap $ T has 11 elements, how many elements does S $ \cup $ T have?

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42 elements.
hence (D) is the correct answer.
answered Jun 19, 2014 by thanvigandhi_1

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