is defined to equal 1. For example, using this formula, the number of permutations of five objects taken two at a time is (For k = n, nPk = n! Thus, for 5 objects there are 5! = 120 arrangements.) For ...

A Python-based Combinatorics Calculator for several variations of permutation and combination problems. Efficiently handles rearrangements and subset formations. User-friendly and modular design. Run ...