排列计算器
计算排列(nPr)
公式
P(n,r) = n! / (n-r)!
Order matters in permutations.
示例
P(10,3)
= 720
常见问题
关于 排列计算器
Calculate permutations — ordered arrangements of r items from n.
计算排列(nPr)
Order matters in permutations.
= 720
Calculate permutations — ordered arrangements of r items from n.