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Independent random variables {U, X, W} have variances V[U] = 1, V[X] = 2, V[W] = 3. Let Y = 2U+ 3X+ 4W. Find the

Independent random variables {U, X, W} have variances V[U] = 1, V[X] = 2, V[W] = 3. Let Y = 2U+ 3X+ 4W. Find the standard deviation of Y. (A) 8.37 (B) 3.16 (C) 4.47 (D) 7.07

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