Find the number of ways of getting an ordered subset of r elements from a set of n elements as nPr (or nPk). Permutations calculator and permutations formula. Free online permutations calculator.
Permutations and combinations, the various ways in which objects from a set may be selected, generally without replacement, to form subsets. This selection of subsets is called a permutation when the order of selection is a factor, a combination when order is not a factor.
In Mathematics, a Permutation is defined as a mathematical concept that determines the number of possible arrangements for a specific set of elements. Therefore, it plays a big role in computer science, cryptography, and operations research. Note: In Permutations, order matters; for example, (2, 1) and (1, 2) are counted as different.