For a Discrete Random Variable X, Which of the Following $\sum f\left(x_{i}\right)$

question 26

Multiple Choice

For a discrete random variable X, which of the following computes the expected value?

• A) \(\sum f\left(x_{i}\right)\)
• B) \(\sum_{i=1}^{\infty} x_{i} f\left(x_{i}\right)\)
• C) \(\sum_{i=1}^{\infty} x_{i}\)
• D) \(\sum \frac { f ( x ) } { x }\)

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