Binomial Distribution Calculator
Calculate binomial distribution probabilities, including P(X=k), P(X≤k), P(X≥k), and cumulative probabilities. Get mean, variance, and full probability distribution charts.
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Binomial Distribution Calculator - Probability Calculator
Calculate binomial distribution probabilities instantly. Find exact, cumulative, and range probabilities for any number of trials and success probability. Includes distribution charts, probability tables, and step-by-step calculations.
What is the Binomial Distribution?
The binomial distribution models the number of successes in a fixed number of independent trials, each with the same probability of success. It's used when there are exactly two outcomes (success/failure), trials are independent, and probability stays constant. Examples include coin flips, quality control inspections, and medical trials.
Binomial Probability Formula
P(X = k) = C(n,k) × p^k × (1-p)^(n-k)How to Use This Calculator
Binomial Distribution Applications
Quality Control
Calculate probability of defects in manufacturing batches to set acceptance criteria.
Medical Trials
Analyze treatment success rates and determine statistical significance.
Marketing Analytics
Model conversion rates and predict campaign performance.
Sports Statistics
Calculate winning probabilities and game outcome distributions.
Frequently Asked Questions
The binomial distribution requires: (1) Fixed number of trials n, (2) Each trial has only two outcomes (success/failure), (3) Trials are independent, and (4) Probability of success p is constant for each trial.