Question 974526: How many unique passwords can be created if every password must be five digits and can consist of either letters or numbers, without repeating passwords?
Answer by Boreal(15235)   (Show Source):
You can put this solution on YOUR website! There are 10 digits and 26 letters (in the English alphabet). I am assuming both letters and numbers can be used.
There are 36 ways to choose the first, 35 the second, 34 the third, 33 the fourth, and 32 the fifth.
45,239,040 ways
I am assuming also that 0 and "O" are not an issue, "l" and "1" either.
If letters or numbers only
10*9*8*7*6=30,240
26*25*24*23*22=7,893,600
That sum is 7,923,840
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