01. Combinatorics

Combinatorics is about (counting) different ways to combine things.

Permutation

A Permutation is an ordered list of (all) unique elements of a set.

Variation

A Variation is a time-ordered selection of k elements out of n.

Combination

A Combination is time-unordered selection of k elements out of n.

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Last modification on: Thu, 09 May 2013 .