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Probability Calculator
Probability from favorable vs total outcomes.
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Results
Probability
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Odds
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As Fraction
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How to use the Probability Calculator
Probability = favorable ÷ total. We also show odds and the reduced fraction.
Frequently Asked Questions
Probability is success ÷ total (1/6). Odds are success : failure (1 to 5). Gamblers quote odds; math uses probability.