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At the end of 1989, 10 million employees in the United States had their paychecks deposited electronically in their bank accounts. By the end of 1996, that number had increased to 50 million. If during the last year of the period from the end of 1989 through the end of 1996, the number of employees who had their paychecks deposited electronically increased by 10 million, what was the average (arithmetic mean) increase per year for the first 6 years in the period?
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· 相关考点
5.2.1 平均值 5.1.4 折线图
5.2.1 平均值
5.1.4 折线图
以上解析由 考满分老师提供。
