MathLiveNumber of permutations
Gives the number of ways to arrange n distinct objects in a row, where each arrangement is a permutation of the set. It is used in counting and combinatorics problems involving ordering.
P_n=n!What the symbols mean
| number of permutations of a set of n distinct objects | |
| number of distinct objects (a non-negative integer) |
About this formula
- FieldMathematics
- TopicCombinatorics
- LevelHigh school
- Also calledpermutations of n objects, factorial, n factorial, number of arrangements, permutation formula, count of orderings
- SourceWikidata Q161519
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