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The returns on the common stock of Maynard Cosmetic Specialties are quite cyclical. In a boom economy, the stock is expected to return 22 percent in comparison to 9 percent in a normal economy and a negative 14 percent in a recessionary period. The probability of a recession is 35 percent while the probability of a boom is 10 percent. What is the standard deviation of the returns on this stock?

12.51 percent

15.88 percent

19.94 percent