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List A consists of r integers, and list B consists of t integers, where t= 3r. The average(arithmetic mean) of the integers in list A is 20, and the average of the integers in list B is 16.
Quantity A
The average of the r + t integers in lists A and B
Quantity B
17.5
B显示答案
· 相关考点
5.2.1 平均值
5.2.1 平均值
以上解析由 考满分老师提供。
