Permutation Calculator
Enter values to compute.
Result
0
permutations
Understanding the Math
The Permutation Calculator (nPr) computes the result using fundamental principles of mathematics. Calculate the number of ways to arrange objects.
Formula Definition
Result = function f(num){if(num<0)return -1;if(num==0)return 1;return num×f(num-1);} f(n)÷f(n-r)
This formula is applied directly to the inputs provided above. Ensure all units are consistent (e.g., all lengths in meters) before calculation to guarantee accuracy.
Example Problem
Given:
- Total Items (n) = 13
- Selected Items (r) = 2
Solution:
Substitute values into the formula:
Result = fu13ctio13 f(13um){if(13um<0)2etu213 -1;if(13um==0)2etu213 1;2etu213 13um×f(13um-1);} f(13)÷f(13-2)
Quick Notes
- Double-check input units. Inconsistent units (e.g. feet vs meters) will yield incorrect results.
- Calculations are performed with high-precision floating point arithmetic.
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