| Symbol | Symbol Name | Meaning / definition | Example |
|---|---|---|---|
| n! | factorial | n! = 1·2·3·…·n | 5! = 1·2·3·4·5 = 120 |
| nPk | permutation |  |
5P3 = 5! / (5-3)! = 60 |
nCk |
combination |  |
5C3 = 5!/[3!(5-3)!]=10 |
| Symbol | Symbol Name | Meaning / definition | Example |
|---|---|---|---|
| n! | factorial | n! = 1·2·3·…·n | 5! = 1·2·3·4·5 = 120 |
| nPk | permutation | |
5P3 = 5! / (5-3)! = 60 |
| nCk |
combination | |
5C3 = 5!/[3!(5-3)!]=10 |