Answer to Question #289410 in Statistics and Probability for Nana

Question #289410

A discrete random variable x has an expected value of 45 and variance of 16. Let us say we double every x's within the probability distribution. What will be the new variance?

Expert's answer

"Var(x)=16\\\\Var(2x)=2^2var(x)\\\\\n=4\\times 16=64"

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