Consider the following independent random variables X1 N(8, 4), X2 (15, 25), X3 - N(12,9). if Y = X1 – X2 + 2X3 2 - 8 Х2 — 15 ´X3 + 2 - 12 U = 2 3 calculate a) P[25.4 < Y < 29.25] b) P[U < 9.83]

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