Permutations
Count ordered selections without repetition.
Your numbers
Ordered selections
Very large counts are floating-point approximations.
Scenario comparison
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Formula
P(n,r)=n!/(n−r)!
Count ordered selections without repetition.
Worked example
- Available items n
- 10
- Selected items r
- 3
- Ordered selections
- 720
Scope and limitations
Very large counts are floating-point approximations.
Inputs are checked for missing values and allowed ranges. A result outside the finite numeric range is not displayed. Rounding affects display, while the calculation uses the model’s numeric precision.
Check your units and assumptions before relying on a result. Changing a label does not convert a currency or physical unit.
Formula version: 92b127ccd53b · Example checked: