Please-help-me-to-find-the-value-of-n-C-8-n-3-C-20-n-3-

Question Number 90531 by Mikael_786 last updated on 24/Apr/20

P l e a s e h e l p m e t o f i n d t h e v a l u e

o f^{'} n^{'}

C_{8}^{n + 3} = C_{20}^{n + 3}

Commented by mr W last updated on 24/Apr/20

n + 3 = 8 + 20

\Rightarrow n = 25

Commented by jagoll last updated on 24/Apr/20

\frac{(n + 3)!}{8! (n - 5)!} = \frac{(n + 3)!}{20! (n - 17)!}

8! (n - 5)! = 20! (n - 17)!

n = 25

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