# 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
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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