Question: 2.Given random variables X 1 , X 2 and X 3 are identically, independently and normally distributed with mean and variance 2 .If Y =

2.Given random variables X1, X2 and X3 are identically, independently and normally

distributed with mean and variance 2.If Y = 2X1+X2-2X3, what is expected

value and standard deviation of Y. (check this)

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