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11 February, 19:48

Evaluate 9 C 5 and 7 P 4

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  1. 11 February, 23:37
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    9C5 = 9!/[5! (9-5) !

    9C5 = 9! / (5!) (4!)

    You finish.

    7P4 = 7! / (7-4) !

    7P4 = 7!/3!

    You finish.
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