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19 February, 21:04

Evaluate the expression 9P1

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Answers (1)
  1. 19 February, 21:32
    0
    9

    Explanation:

    The expression above signifies the Permutation expression

    Permutation expression is given as nPr

    The Permutation expression is calculated as:

    nPr = P (n, r) = n! / (n - r) !

    It the above question, we were asked to evaluate the expression 9P1

    From the above question, we can see that:

    n = 9 and r = 1

    Therefore, the expression

    9P1 = 9! / (9 - 1) !

    9P1 = 9! / 8!

    = 9 * 8 * 7 * 6 * 5 * 4 * 3 * 2 * 1 / 8 * 7 * 6 * 5 * 4 * 3 * 2 * 1

    = 362880 / 40320

    = 9

    Therefore, the evaluation of the expression 9P1 = 9
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