题目信息
In a certain company, the ratio of the number of managers to the number of production-line workers is 5 to 72. If 8 additional production-line workers were to be hired, the ratio of the number of ,managers to the number of production-line workers would be 5 to 74. How many managers does the company have?
A:5
B:10
C:15
D:20
E:25
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正确答案：
D:20
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