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# 9.12: Probability of Compound Events

Difficulty Level: Basic Created by: CK-12
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Practice Probability of Compound Events

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### Vocabulary Language: English Spanish

experimental probability

The experimental probability is the ratio of the proposed outcome to the number of experimental trials. $P(success)= \frac{number \ of \ times \ the \ event \ occurred}{total \ number \ of \ trials \ of \ experiment}$

Independent Events

Two events are independent if the occurrence of one event does not impact the probability of the other event.

mutually exclusive

Events that cannot happen at the same time are called mutually exclusive events.

mutually inclusive

Unlike mutually exclusive events, mutually inclusive events can occur at the same time.

complement

A mutually exclusive pair of events are complements to each other. For example: If the desired outcome is heads on a flipped coin, the complement is tails.

Event

An event is a set of one or more possible results of a probability experiment.

Probability

Probability is the chance that something will happen. It can be written as a fraction, decimal or percent.

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Difficulty Level:
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