ONE QUESTION, ONE STEP
ZX-344C8DAAD6Distributions and measures of center and spread · 第 11 题
Distributions and measures of center and spread · 原库模块 1 · Q11 原库参考解析
The mean amount of time that the 20 employees of a construction company have worked for the company is 6.7 years. After one of the employees leaves the company, the mean amount of time that the remaining employees have worked for the company is reduced to 6.25 years. How many years did the employee who left the company work for the company?
参考答案：
解题思路
容易忽略的一步
