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Question 22 4 pts There is a probability of 20 percert that the economy will boom; otherwise, it will be normal. Stock X is expected to return 24 percent in a boom and 12 percent otherwise. Stock Y is expected to return 14 percent in a boom and 6 percent otherwise. What is the standard deviation of a portfolio that is invested 40 percent in Stock X and the remaining in Stock Y? a 3.88 percent