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April 10th, 2013, 02:05 PM   #1
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permutation probability problem,,,

A company car that has a seating capacity of eight is to be used by eight employees who have formed a car pool. If only four of these employees can drive, how many possible seating arrangements are there for the group?

So i understand that i should use the permuation formula becasue... ORDER MATTERS! but I'm not sure how the heck im supposed to set this up.



guys please don't just post a link to somthing and make me read/ pick through a 4 page article to find what i need which may or may not be there.
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April 10th, 2013, 02:27 PM   #2
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Re: permutation probability problem,,,

4 * (7 nPr 7) = 4 * 7! = 20160.
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April 10th, 2013, 02:35 PM   #3
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Re: permutation probability problem,,,

thanks man!
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