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- The annual rainfall in a certain region is approximately normally distributed with mean 42.7 inches and standard deviation 6.1 inches. Round answers to the nearest tenth of a percent a) What percentage of years will have an annual rainfall of less than 44 inches? l l% b) What percentage of years will have an annual rainfall of more than 39 inches? l l% c} What percentage of years will have an annual rainfall of between 37 inches and 43 inches?| |% Next