Probability Hub
Factorials, Permutations (nPr), and Combinations (nCr)
Factorial (n!)
3,628,800
Permutation (nPr)
720
Combination (nCr)
120
Probability & Sets
Calculate total variations and choices. Permutations (nPr) account for arrangement order, while Combinations (nCr) focus purely on selection sets without regard for sequence.