No need excel by calculation

Question 1 2 points Save Ans if the economy booms, Meyer&Co. stock will have a return of 21.1 percent. If the economy goes into a recession, the stock will have a loss of 13.4 percent. The probability of a boom is 60 percent while the probability of a recession is 40 percent. What is the standard deviation of the returns on the stock? 16.909 14.7906 13.5696 15.939 9.7096