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Given Prob. 20% State Recession Average Boom Return -11% 10% 50% 30% 28% 20. What is the expected return? 21. What is the standard deviation? 22. What is the coefficient of variation? 23. If Krf - 5%, what is the Sharpe's ratio? 24. Standardization allows future contracts to be traded on organized exchanges, while margin accounts allow the exchanges to guarantee the contract. A) True B) False