Understanding Theoretical Probability

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Theoretical Probability

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Ratio of favorable outcomes to total possible outcomes

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Formula for Theoretical Probability

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P(E) = Number of favorable outcomes / Total number of possible outcomes

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Sample Space

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Set of all possible outcomes

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Event

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A specific outcome or group of outcomes

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Favorable Outcome

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Outcome that satisfies the event condition

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Probability of Impossible Event

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0

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Probability of Certain Event

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1

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Probability Range

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0 to 1

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Example: Probability of rolling a 3 on a die

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P(3) = 1/6

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Equally Likely Outcomes

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Outcomes with the same probability of occurring