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题目内容双击单词支持查询和收藏哦～
The average (arithmetic mean) weight of the boxes in a certain shipment is 18 pounds. Each of the boxes in the shipment weighs either 10 pounds or 20 pounds.
Quantity A
The number of 20-pound boxes in the shipment
Quantity B
8
D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。
