math

Elisa need to pick a numerical password that contains 4 digits using the numbers 0-9 If none of the digits can be repeated, how many 4-digit passwords are possible

  1. 0
  2. 5
asked by danny
  1. 10*9*8*7 is the number of passwords available.

    posted by bobpursley
  2. 10*9*8*7

    posted by Damon

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