Permutations Calculator
P(n,r) — order matters
变量说明
n= total itemsr= items arrangedP(n,r)= number of permutations
Permutations formula
Order matters — each different ordering is counted.
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All arrangements (r = n)
Arrange all n items.
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Permutations with repetition
When items can repeat.
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Permutations vs combinations
Relationship between the two.
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n= total items
r= items arranged
P(n,r)= number of permutations
Deep Dive
Read the full guide on how to use this calculator effectively
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