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Suppose x has a distribution with mean 10 and variance 4, y has a distribution with mean 20 and variance 9. you can find the mean of x + y with this information.
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Suppose x has a distribution with mean 10 and variance 4, y has a distribution with mean 20 and variance 9. you can find the mean of x + y with this information.

User Mathakoot
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1 Answer

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If this is a true/false question, then the answer is true. If you're supposed to find the mean of
X+Y, then we get


\mathbb E[X+Y]=\mathbb E[X]+\mathbb E[Y]=10+20=30

since expectation is linear.
User Lvollmer
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