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= n! Use: n k!(n-k)! to solve the combination. At a Chinese buffet, there are five entree selections. If two entrees may be selected, how many ways may the plates be filled? [?] ways Enter
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= n! Use: n k!(n-k)! to solve the combination. At a Chinese buffet, there are five entree selections. If two entrees may be selected, how many ways may the plates be filled? [?] ways Enter

= n! Use: n k!(n-k)! to solve the combination. At a Chinese buffet, there are five-example-1
User Josh Sherick
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5 votes

_nC_k=(n!)/(k!(n-k)!)

User Manesh Timilsina
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