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Precalculus ยท S-MD

Expected Value โ€” Discrete Probability Distributions

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PrecalculusCommon Core HSS-MD.A.2S-MDVerified correct โœ“

Worked examples

A discrete random variable X has the following probability distribution: P(X=4) = 5/8, P(X=12) = 1/8, P(X=18) = 1/8, P(X=19) = 1/8. Calculate the expected value E(X).
Answer: 8.625
A discrete random variable X has the following probability distribution: P(X=10) = 3/10, P(X=13) = 5/10, P(X=18) = 2/10. Calculate the expected value E(X).
Answer: 13.1

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Permutations and Combinations โ€” Counting PrinciplesCompound Events โ€” Independent and Dependent

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