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Mathematics 19 Online
OpenStudy (anonymous):

How many three-letter code words can be constructed from the first nine letters of the Greek alphabet if no repetitions are allowed?

OpenStudy (anonymous):

The answer is permutations.

OpenStudy (anonymous):

\[\Large ^9P_3 \]

OpenStudy (anonymous):

http://www.wolframalpha.com/input/?i=(9+permute+3)

OpenStudy (anonymous):

9!/ (9-3)!

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