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Probability · random variables

Expected Value of a Discrete Variable Formula

Computes the long-run average of a discrete random variable.

E[X] = ΣxᵢP(X = xᵢ)

Variables

X
random variable
xᵢ
possible values

Reference details

Subject
Probability
Topic
random variables
Plain text
E[X]=sum x_i P(X=x_i)

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