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Mathematics 93 Online
OpenStudy (anonymous):

Simplify: (n-r)!/(n-r+1)!

OpenStudy (agreene):

\[\frac{1}{n-r+1}\]

jimthompson5910 (jim_thompson5910):

(n-r)!/(n-r+1)! (n-r)!/[(n-r+1)(n-r)!] 1/(n-r+1)

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