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OpenStudy (anonymous):
You need to arrange 7 of your favorite books along a small shelf. How many different ways can your arrange the books? Assuming that the order of the books makes a difference to you.
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jimthompson5910 (jim_thompson5910):
You have 7 books for the first slot, 6 for the second, 5 for the third, etc etc until you get down to 1 for the last slot. Multiply all these choices together to get your final answer.
jimthompson5910 (jim_thompson5910):
This is the same as 7 factorial (7!)
OpenStudy (anonymous):
Thanks
jimthompson5910 (jim_thompson5910):
yw
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