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Write the following statement in set language. \[\] The number of elements in the union of two sets A and B is equal to the sum of the cardinal numbers of A and B, provided A and B are disjoint sets.

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n(A $ \cup $ B) = n(A) + n(B), provided A $ \cap $ B = $ \phi $
answered Jun 24, 2014 by thanvigandhi_1

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