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OpenStudy (anonymous):
A computer password uses 5 letters where no letter may be repeated. How many passwords are possible? 26!/5! 26!/21! 21!/5!
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OpenStudy (anonymous):
26!/5!
Parth (parthkohli):
There are 26 for the first, then 25 for the second, then 24 for third, then 23 for fourth, then 22 for fifth.
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