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mofa留学圈
During the last decade, the mean life expectancy in a certain country was a constant 75 years. In this country, epidemics occurred in Years X, Y, and Z of this period. The graph gives mortality data for each of the epidemics, showing both the numbers of deaths and the numbers of years of life lost as a result of those deaths.In the following statements, which pertain only to Years X, Y, and Z, average refers to the arithmetic mean.Use the drop-down menus to create the most accurate statements based on the information provided.The year with the greatest number of deaths was .The year with the greatest average number of years of life lost per death was . 
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