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Let X and Y be two independent random variables with the following means and standard deviations. mean standard deviation X. 20. 3 Y 45. 4
Let X and Y be two independent random variables with the following means and standard deviations.
mean standard deviation
X. 20. 3
Y 45. 4
A.Find the mean of X+Y.
b.Find the standard deviation of X+Y
C Find the mean of 2X+4
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