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Sarah has invested 60% of her money in stock X and the remainder in stock B. She assesses their prospects as follows: 1) What are
Sarah has invested 60% of her money in stock X and the remainder in stock B. She assesses their prospects as follows: 1) What are the expected return and standard deviation of returns on his portfolio? 2) Is Sarah's portfolio better or worse that one invested entirely in stock X, or is it not possible to say? Please assume that Sarah is risk-averse
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