Probability / Combination Calculator
Enter the total count (n) and the number to choose (r) to get permutations, combinations, and factorial instantly.
Enter n and r.
Permutations (nPr)
Combinations (nCr)
Factorial (n!)
nPr = n! ÷ (n−r)! · nCr = n! ÷ (r! × (n−r)!)