Combinatorial proof of
$\binom{n}{k} = \binom{n}{n-k}$
4
$\begingroup$
How do I prove this combinatorially?
$$\displaystyle \binom{n}{k} = \binom{n}{n-k}$$
combinatorics
binomial-coefficients
asked
2011-12-13
user id:21181
21
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3 Answers
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