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7 December, 11:31

Evaluate 11C7 and 12P3.

11C7 = ?

12P3 = ?

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Answers (1)
  1. 7 December, 11:40
    0
    11C7

    = 11 x 10 x 9 x 8 x 7! / (7!) (4!)

    = (11 x 10 x 9 x 8) / (4 x 3 x 2 x 1)

    = 7920 / 24

    = 330

    12P3

    = 12 x 11 x 10 x 9! / (9!)

    = (12 x 11 x 10)

    = 1320
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