# Question

Independent random variables X and Y have the means and standard deviations as given in the following table. Use these parameters to find the expected value and SD of the following random variables that are derived from X and Y:

(a) 2X - 100

(b) 0.5Y

(c) X + Y

(d) X – Y

(a) 2X - 100

(b) 0.5Y

(c) X + Y

(d) X – Y

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