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11 July, 00:09

Evaluate

11C8 and 7P4.

11C8=

7P4=

+5
Answers (1)
  1. 11 July, 00:28
    0
    11C8

    = 11 x 10 x 9 x 8! / (8!) (3!)

    = (11 x 10 x 9) / (3 x 2 x 1)

    = 990 / 6

    = 165

    7P4

    = 7 x 6 x 5 x 4 x 3! / (3!)

    = (7 x 6 x 5 x 4)

    = 840
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