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Questions are based on the following data. Each of the 15 customers who arrived at a customer service desk between 9 A.M. and 10
Questions are based on the following data. Each of the 15 customers who arrived at a customer service desk between 9 A.M. and 10
admin
2019-10-11
57
问题
Questions are based on the following data.
Each of the 15 customers who arrived at a customer service desk between 9 A.M. and 10A.M. was served in order of arrival by one of two customer service representatives. Each representative served one customer at a time and finished with that customer before serving any other customers. The graph shows the waiting and service times, recorded to the nearest minute, for customers numbered 1 to 15.
According to the recorded times, which customer had the greatest ratio of waiting time to service time?
选项
A、customer 6
B、customer 7
C、customer 8
D、customer 9
E、customer 15
答案
E
解析
观察灰色条与黑色条的长度比例,显然15号客人的黑色条最短,灰色条最长,灰色/黑色的比值最大,故答案为E。
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