Let X,,X2, X, be independent and identical normal variables with respective means Ml1 = 5,112 = 10, M3 = 15 and M4 = 20

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answerhappygod
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Let X,,X2, X, be independent and identical normal variables with respective means Ml1 = 5,112 = 10, M3 = 15 and M4 = 20

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Let X,,X2, X, be independent and identical normal variables withrespectivemeans Ml1= 5,112= 10, M3 = 15 and M4 = 20 and respective variances 01 = 1, 02 =2,03 = 3andO= 4. IY = X, + X2 + X3 + Xa(a) Find E(M)and VAR(Y)(b)Find P(46 < Y < 52)
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