Algebra · Classes 11, 12
Permutations
Ordered selections of r from n distinct objects.
FORMULA
\({}^nP_r=\frac{n!}{(n-r)!}\)
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Enter values to see a result and calculation steps.
Worked example
5P2 = 20
Understand this formula
Ordered selections of r from n distinct objects.
Check measurement units, mathematical domains and rounding before applying any result in an examination.