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In a quality control study, 200 boxes of brackets were examined; each box contained 50 brackets. For each box, the ratio, f, of the number of defective brackets in the box to the total number of brackets in the box was recorded. The number of defectives per box varied from 1 to 12, inclusive.
Quantity A
The sum of the 200 values of f
Quantity B
The sum of the squares of the 200 values of f
A显示答案
· 相关考点
2.1.1 分数的加减乘除运算
以上解析由 考满分老师提供。
