Statistics & Probability
Binomial Distribution Calculator
Lets users solve and check binomial distribution instantly with formula, steps and examples — no manual math.
Enter your details
01
Your result
P(X = k)
11.72%
P(X = 3) = 11.719%; P(X ≤ 3) = 17.188%.
P(X ≤ k)
17.19%
Mean (np)
5
Std deviation
1.5811
About this calculator
Binomial probability of exactly k successes in n independent trials: P = C(n,k)·pᵏ·(1−p)ⁿ⁻ᵏ. Mean = np, variance = np(1−p).
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