SOLUTION: 1. Passwords are made using 4 letters and 2 digits. How many passwords can be made if repetition of letters and digits is allowed?
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Question 197735: 1. Passwords are made using 4 letters and 2 digits. How many passwords can be made if repetition of letters and digits is allowed? Found 2 solutions by stanbon, edjones:Answer by stanbon(75887) (Show Source):
You can put this solution on YOUR website! 1. Passwords are made using 4 letters and 2 digits. How many passwords can be made if repetition of letters and digits is allowed?
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26^4*10^2 = 45,697,600
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Cheers,
Stan H.
You can put this solution on YOUR website! 26P4
=26!/(26-4)!
=26*25*24*23*22!/22!
=358,800
.
10P2
=10!/(10-2)!
=10*9*8!/8!
=10*9
=90
.
358800*90
=32,292,000
.
Ed
(