Permutations (nPr)
nPr = n! / (n - r)!
Combinations (nCr)
nCr = n! / (r!(n - r)!)
使用方法
Enter n and r to calculate permutations and combinations.
- Permutation nPr
- Combination nCr
- Supports large values
使用案例
- 计算排列和组合
- 估计可能的结果
Enter n and r to calculate permutations and combinations.