The product of first n odd natural numbers equals

The product of first n odd natural numbers equals

  1. A

     2nCn nPn

  2. B

    12n 2nCn nPn

  3. C

    14n 2nCn 2nPn

  4. D

    none of these

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    Solution:

    1.3.5(2n1)=(2n)!2n(n!)=12n 2nCn nPn

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