👉 In mathematics, a permutation is an arrangement of objects in a sequence. It is essentially a rearrangement of an array or list, and it is used to represent all possible arrangements of a set of objects without considering their order. Here are some examples: 1. The permutation of the letters "ABC" can be represented as: - ABC - ACB - BAC - CAB - BC 2. The permutation of the numbers 1, 2