SOLUTION: You have 10 books, and a bookshelf that has room for 6 of them. How many ways can you arrange the books on the bookshelf?

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Question 227716: You have 10 books, and a bookshelf that has room for 6 of them. How many ways can you arrange the books on the bookshelf?
Answer by stanbon(75887) About Me  (Show Source):
You can put this solution on YOUR website!
You have 10 books, and a bookshelf that has room for 6 of them. How many ways can you arrange the books on the bookshelf?
It's a permutation problem.
n = 10, r = 6
nPr = n!/(n-r)!
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10P6 = 10!/(4!) = 10*9*8*7*6*5 = 151200
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Cheers,
Stan H.