• Answer of this question

    nC2= nC5    then n=?
    Davneet Singh's image
    Davneet Singh

    Hello

    If

    nCr = nCm

    Then

    r = m

    & r = n - m

     

    So, 

    nC2 = nC5

    Therefore, 

    2 = n - 5

    2 + 5 = n

    7 = n

    n = 9

    Written on Aug. 3, 2017, 6:26 p.m.

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