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Mathematics 15 Online
OpenStudy (anonymous):

there are 4 kids in marias family. how many permutations are listing the children in age order?

OpenStudy (anonymous):

4!

OpenStudy (anonymous):

how come?

OpenStudy (anonymous):

There are four positions to fill, and four kids to fill them. There are four options for first position, three options left for second position, and so on.

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