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Danny has a test average (arithmetic mean) of 75 on ten 100-point tests.
Quantity A
The least possible number of additional 100-point tests he must take to raise his cumulative average to 90
Quantity B
12
A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。
