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you have 5 antiques and want to display 3 on a shelf. how many different 3 antique arrangements are possible
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you have 5 antiques and want to display 3 on a shelf. how many different 3 antique arrangements are possible

User Yuhong Bao
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\bf _(n)P_(r)=\cfrac{n!}{(n-r)!}\qquad\qquad _(5)P_(3)=\cfrac{5!}{(5-3)!}
User Echasnovski
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