SOLUTION: How many 9 character letter-based passwords can you make if you repeat letters?

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Question 1156919: How many 9 character letter-based passwords can you make if you repeat letters?
Found 3 solutions by ikleyn, josmiceli, Edwin McCravy:
Answer by ikleyn(52847) About Me  (Show Source):
You can put this solution on YOUR website!
.

26 symbols in the English alphabet.


so you have 26 possible options in each of 9 positions.


26%5E9  = 5429503678976 different codes, in all.

Solved.


Answer by josmiceli(19441) About Me  (Show Source):
You can put this solution on YOUR website!
There are 26 choices for each position of the
password. ( A through Z )
+26%5E9+ possible codes



Answer by Edwin McCravy(20060) About Me  (Show Source):
You can put this solution on YOUR website!

If you use both lower case and upper case letters then it's

529 = 2779905883635712 9-character letter-based passwords.

Edwin