Permutations & combinations
Math
Permutations & combinations
How many ways can I choose?
Example values are filled in. Replace them with your own.
Example calculation
Permutations: 720.
Permutations
720
Combinations
120
Permutations count different orders separately. Combinations ignore order.
See formula and assumptions
Permutations nPr = n!/(n−r)!; combinations nCr = nPr/r!
- Total n
- Example: 10. Enter the number only.
- Chosen r
- Example: 3. Enter the number only.