Combinations

Computes the number of ways to choose $k$ elements among $n$ : $(\binom{n}{k})$ .

Syntax

combinations(Integer, Integer)

combinations(List | Vector, Integer)

Given two integers $n$ and $k$ , returns the number of ways to choose $k$ elements among $n$ : $\binom{n}{k}$ .

Given a list or vector $L$ and an integer $k$ , returns a list with all the possible ways to choose $k$ element among $L$ .