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MariettaO [177]
3 years ago
13

How many three-letter sequences are possible that use the letters q,u,a,k,e,s at most once each?

Mathematics
1 answer:
Angelina_Jolie [31]3 years ago
8 0
6P3 => 6!/(6-3)! = 120.

I can't very well explain, but I hope it works.
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