Probability Calculator

Combinations, permutations, and distributions.

AP Statistics

Combinations & Permutations

n

r

Binomial Probability

P(X = k) = C(n,k) · p^k · (1-p)^(n-k)

n (trials)

k (successes)

p (probability)

Normal Distribution (Z-Score)

Value (x)

Mean (μ)

Std Dev (σ)