Probability Calculator
Apply the addition and multiplication rules, tell independent from dependent events, and count with permutations and combinations.
1 Permutation / combination calculator
Order matters → P(n, k). Order does not → C(n, k).
Results
Enter n and k, then press Count.
2 “Or” / “and” rule calculator
P(A or B) needs the overlap; P(A and B) for independent events is just the product.
Results
Enter the three probabilities, then press Compute.