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14 February, 11:50

Evaluate 10^C6 and 11^P4

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  1. 14 February, 12:12
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    These are combinations and permutations.

    For 11P4, you multiply 11*10*9*8

    You stop when there are 4 numbers. ex: 11P3 = 11*10*9, 11P2 = 11*10

    For 10C6, you do same as permutations but then divide by 6!

    ---> (10*9*8*7*6*5) / (6*5*4*3*2*1)

    You can simplify this by cancelling the 5,6,8

    ---> (10*9*7) / 3
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