Permutations Calculator (nPr)
Count the ordered arrangements of r items taken from n — with or without repetition, exactly.
P(10, 3)
720
Show the work
Ways to arrange r of n
P(n, r) = n! ÷ (n − r)!
10! ÷ 7! = 720
How it works
P(n, r) = n! ÷ (n − r)!; with repetition nʳ
Questions
- How does the permutations calculator (nPr) work?
- P(n, r) = n! ÷ (n − r)!; with repetition nʳ.
- What do I need to enter?
- Total items (n), Arranged (r), Repetition. Optional fields can be left blank.
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