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For this question, I really confused about why a=this thing. Also, could you please tell me the specific steps of the thing that I highlighted in a red pen? I really don’t know how to use math to deal with it. Finally could you tell me how to calculate Var(3X1),VarX2 and Cov(3X1-X2)? Thanks! Will rate:)

각 --Ye a where aa Chec
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Answer #1

nMN 1 2 月t(x,)- o, £(x). , v~,(X)-.um (%)= 2 a c 1 2 Tom, isto, a 3, b- 1 Cs Scanned with CamScanner

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