The price-earnings (PE) ratios of a sample of stocks have a mean value of 12.75 and a standard deviation of 2.8. If the PE ratios have a bell shaped distribution, what percentage of PE ratios that fall between: A. 9.95 and 15.55. Percentage =  % B. 7.15 and 18.35. Percentage =  % C. 4.35 and 21.15. Percentage =  %

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