View source for Binomial coefficient (n choose k) equals (n choose (n-k))

==Theorem==
The following formula holds:
$${n \choose k} = {n \choose n-k},$$
where ${n \choose k}$ denotes the [[binomial coefficient]].

==Proof==

==References==
* {{BookReference|Handbook of mathematical functions|1964|Milton Abramowitz|author2=Irene A. Stegun|prev=Binomial coefficient|next=Binomial coefficient (n choose k) equals (-1)^k ((k-n-1) choose k)}}: 3.1.3