๐ข Combination & Permutation Calculator
Enter n between 0 and 1000, with r โค n
Permutations (nPr)720
Combinations (nCr)120
Calculate the total number of permutations (nPr) and combinations (nCr) when choosing r items out of n. Permutations count order as significant, while combinations don't. Useful for probability and statistics homework, or for figuring out how many possible outcomes a lottery or drawing has.
How to use
- Enter the total number of items, n.
- Enter how many items to choose, r (r โค n).
- The permutation (nPr) and combination (nCr) values are calculated automatically.
FAQ
What's the difference between a permutation and a combination?
A permutation (nPr) counts different orderings of the chosen items as distinct. A combination (nCr) only counts the set of chosen items, ignoring order.
Is there a limit on n?
n is capped at 1000 to avoid calculation and display issues.
What happens if r is greater than n?
You can't choose more items than are available, so no result is shown. Make sure r โค n.