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Mathematics 7 Online
OpenStudy (anonymous):

In how many ways can you arrange five books along a shelf, assuming that the order of the books makes a difference?

OpenStudy (anonymous):

(5)(4)(3)(2)(1) = 5!

OpenStudy (anonymous):

There are five choices for the first book, after that there are 4 for the second book. Then 3 for the third and so on.

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