Select from Bernoulli, Binomial, Poisson, Geometric, Negative Binomial, and Discrete Uniform. More about them in here.Discrete Distribution CalculatorSelect Distribution: Functions of Discrete Random VariablesDiscrete UniformBernoulliBinomialNegative BinomialGeometricPoissonConstant c: Constant d: E(X): V(X): CalculateE(Y): V(Y): a: b: x (for PMF): CalculatePMF: Mean: Variance: p (probability of success): x (0 or 1): CalculatePMF: Mean: Variance: n (number of trials): p (probability of success): x (number of successes): CalculatePMF: Mean: Variance: r (number of successes): p (probability of success): x (number of trials): CalculatePMF: Mean: Variance: p (probability of success): x (number of trials): CalculatePMF: Mean: Variance: λ (mean rate): T (time/space interval): x (number of events): CalculatePMF: Mean: Variance: