In probability theory, the expected value (also called expectation, mean, or first moment) is a generalization of the weighted average. The expected value of a random variable with a finite number of outcomes is a weighted average of all possible outcomes.
In probability theory, the expected value (also called expectation, mean, or first moment) is a generalization of the weighted average. The expected value of a random variable with a finite number of outcomes is a weighted average of all possible outcomes.
Source: Wikipedia "Expected value" · CC BY-SA 4.0
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