Let A and B be two sets such that n(A×B)=6. If three elements of A x B are (3,2),(7,5),(8,5), then 

 Let A and B be two sets such that n(A×B)=6. If three elements of A x B are (3,2),(7,5),(8,5), then 

  1. A

    A={3,7,8}

  2. B

    B={2,5,7}

  3. C

    B={3,5}

  4. D

     None of these 

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    Solution:

    (3,2),(7,5),(8,5)A×B

    3,7,8A and 2,5B

    Also, n(A×B)=6=3×2

      A={3,7,8} and B={2,5}

     

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