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Probability Calculator

Easily calculate simple probabilities.

What You Need to Know About Probability Calculation

Probability theory and chance calculation methods

Probability numerically expresses the chance of an event occurring on a scale from 0 to 1. 0 means the event never occurs, 1 means it definitely occurs, and 0.5 means a 50% chance. Probability = Favorable Outcomes ÷ Total Outcomes. Basic probability concepts: Independent events don't affect each other (rolling two dice). Dependent events where one affects the other (drawing two cards from a deck). Joint probability: The probability of two events occurring together P(A and B) = P(A) × P(B). For mutually exclusive events P(A or B) = P(A) + P(B). Daily life probability applications: Calculating odds in gambling and lottery games, weather forecasting (70% chance of rain), risk analysis and insurance calculations, statistical predictions and surveys, genetics and inheritance calculations. Understanding probability theory helps you make rational decisions.

Frequently Asked Questions

Find answers to common questions

Probability is a numerical expression of the chance that an event will occur. It ranges from 0 to 1, where 0 means the event never occurs and 1 means it definitely occurs.

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