Binomial Distribution Calculator
Binomial probability calculator: P(X = k), P(X ≤ k), P(X ≥ k), mean and variance for n trials with success probability p.
How to use the Binomial Distribution Calculator
- Enter or select: Trials n, Successes k, Probability of success p.
- The results (P(X = k), P(X ≤ k), P(X < k), P(X ≥ k), Mean np, Variance np(1−p)) are calculated instantly as you type.
- Use “Copy link” to share the calculation with the same input values.
Formula
- P(X = k) = C(n, k)·pᵏ·(1 − p)ⁿ⁻ᵏ