Probability & Combinatorics Calculators
Count and weigh outcomes: compute a single-event probability and its complement, and evaluate combinations, permutations and factorials with integer validation and overflow handling.
Standard Deviation
Population or sample standard deviation and variance, with the denominator (n or n−1) stated.
e.g. Population of 8 valuesStepsDecimal resultMultiple methods
Combinations & Permutations
Compute nCr, nPr and n! with integer validation, overflow handling and identity checks.
e.g. C(5, 2)StepsExact resultVerified
Probability
Event probability = favourable ÷ total outcomes, with the complement, as fraction, decimal and percent.
e.g. Rolling a specific numberStepsExact resultDecimal result