Answer a.
Stock A:
Expected Return = 0.15 * 0.19 + 0.60 * 0.15 + 0.25 * 0.11
Expected Return = 0.1460 or 14.60%
Stock B:
Expected Return = 0.10 * 0.23 + 0.60 * 0.13 + 0.30 * 0.12
Expected Return = 0.1370 or 13.70%
Stock A has the higher expected return.
Answer b.
Stock A:
Variance = 0.15 * (0.19 - 0.146)^2 + 0.60 * (0.15 - 0.146)^2 +
0.25 * (0.11 - 0.146)^2
Variance = 0.00062
Standard Deviation = (0.00062)^(1/2)
Standard Deviation = 0.0250 or 2.50%
Stock B:
Variance = 0.10 * (0.23 - 0.137)^2 + 0.60 * (0.13 - 0.137)^2 +
0.30 * (0.12 - 0.137)^2
Variance = 0.00098
Standard Deviation = (0.00098)^(1/2)
Standard Deviation = 0.0313 or 3.13%
Stock B is riskier.
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