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17 May, 08:48

Evaluate. 7C6

A. 9

B. 1

C. 5,040

D. 7

can someone explain this to me?

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Answers (2)
  1. 17 May, 09:51
    0
    This question involves mathematical combinations. The formula is:

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

    Substituting the values:

    7C6 = 7!/6! (7 - 6) !

    = (7 x 6 x 5 x 4 x 3 x 2 x 1) / (6 x 5 x 4 x 3 x 2 x 1) (1)

    = 7

    The answer is D
  2. 17 May, 11:10
    0
    Main formula nCp = n! / p! (n-p) !

    so 7C6 = 7! / 6! (1!) = 5,040/720=7

    the answer is D. 7
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