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Y is discrete rndom variable. mean=µ and variance σ2.If a and b are cnstnts a E(aY + b) = aE(Y ) + b = aµ + b. b V(aY + b) = a2V(Y ) = a2σ2.?

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Y is discrete rndom variable. mean=µ and variance σ2.If a and b are cnstnts a E(aY + b) = aE(Y ) + b = aµ + b. b V(aY + b) = a2V(Y ) = a2σ2.?

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