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24 October, 21:39

A combination lock has numbers 0-49 on it. How many different 3-digit lock

combinations are possible if no digit can be repeated?

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Answers (1)
  1. 25 October, 01:09
    0
    19,600

    Step-by-step explanation:

    0-49=50 numbers

    n=50

    r=3

    C (n, r) = n! / (r! (n-r) !)

    =50! / (47!) (3!)

    C (n, r) = C (50,3)

    =50! / (3! (50-3) !)

    = 19600
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