19. The following rate of returns for Stock A: [Use this data to answer questions 19 and 20]

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Year Stock A

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200X 30%

200Y 25%

200Z -10%

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Calculate the expected return of Stock A

a. 10% b. 12% c. 15% d. 22% e. none of the given ones

20. The standard deviation of returns of Stock A is:

a. 25% b. 14.7% c. 17.8% d. 21.8% d. none of the given ones