Permutations Calculator
Calculate the number of possible arrangements from a set of items
Understanding Permutations
Formula
P(n,r) = n! / (n-r)!
Where n is the total number of items and r is the sample size
Example
If you have 5 different books and want to arrange 3 of them on a shelf, you would have:
- n = 5 (total books)
- r = 3 (books to arrange)
- P(5,3) = 60 different possible arrangements