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4 July, 17:05

Simplify the expression 7C4

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  1. 4 July, 17:26
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    To simplify 7C4 we use the combination formula given by:

    nCr=n!/[ (n-r) ! r!]

    thus:

    In our case we shall have:

    n=7 and r=4

    7C4

    =7!/[ (7-4) !4!]

    =5040/[6*24]

    =5040/144

    =35

    The answer is 35
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