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Expected return and standard deviation. Use the following information to answer the questions: a. What is the expected return
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(a) Let the return be denoted by Ri and Probability by Pi for state of economy i

Expected Return = ER = ΣPiRi

Expected Return for A = ERA = 0.31*0.02 + 0.51*0.02 + 0.18*0.02 = 0.02

Expected Return for B = ERB = 0.31*0.21 + 0.51*0.08 + 0.18*(-0.03) = 0.1005

Expected Return for C = ERC = 0.31*0.29 + 0.51*0.19 + 0.18*(-0.27) = 0.1382

(b) Variance = ΣPi(Ri- ER)2

Variance for A = 0.31(0.02 - 0.02)2 + 0.51*(0.02 - 0.02)2 + 0.18(0.02 - 0.02)2 = 0

Variance for B = 0.31(0.21 - 0.1005)2 + 0.51*(0.08 - 0.1005)2 + 0.18(-0.03 - 0.1005)2 = 0.0069968

Variance for C = 0.31(0.29 - 0.1382)2 + 0.51*(0.19 - 0.1382)2 + 0.18(-0.27 - 0.1382)2 = 0.0385048

(c) Standard Deviation = sqrt (variance)

Standard Deviation for A = sqrt(0) = 0

Standard Deviation for B = sqrt(0.0069968) = 0.0836469

Standard Deviation for C = sqrt(0.0385048) = 0.1962264

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