SOLUTION: Billy has 10 books, but he only has space for 6 on his bookshelf. How many different arrangements (order does not matter) of the books can Billy make?

Question 270418: Billy has 10 books, but he only has space for 6 on his bookshelf. How many different arrangements (order does not matter) of the books can Billy make?
Answer by stanbon(75887) (Show Source): You can put this solution on YOUR website!
Billy has 10 books, but he only has space for 6 on his bookshelf. How many different arrangements (order does not matter) of the books can Billy make?
Ans: 10P6 = 10!/4! = 10*9*8*7 = 151,200
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Cheers,
Stan H.
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