GRE考试

【单选题】
A、sample of employees were tested on data—entry skills for one hour，and the number of errors (x) they made and the percent of employees (p) making x errors were recorded as follows． Number
ofErrors
x Percent of
Employees
p 0
1
2
3
4
5
6 or more 2%
5%
10%
24%
17%
20%
22%
If those employees who made 6 or more errors were removed from the sample and an employee were selected at random from those remaining，what is the probability that the employee selected made no errors

网考网参考答案：C
网考网解析：
若把犯6个或6个以上错误的职员移出样本，并且从剩余职员中随机挑出一名职员，问该职员未犯任何错误的概率是多少 由袁可知，有6个或6个以上错误的职员的百分比为22%，移走这一部分后，剩余78%的职员中，不犯错误的职员占2%，所以其概率为： [*] document.getElementById("warp").style.display="none"; document.getElementById("content").style.display="block"; 查看试题解析出处>>