问题描述：
英语翻译
In a creative-writing course,60 students chose from among 5 genres for each assignment.The graph above shows the distribution of the stories turned in for one assignment.If there were 6 assignments during the semester,and the same number of students turned in Detective Stories for each assignment,what is the total number of Detective stories turned in during the semester.
如果图看不清的话..
Detective：20% Action-adventure：30% Mystery：25% Western：10% Horror：15%
In a creative-writing course,60 students chose from among 5 genres for each assignment.The graph above shows the distribution of the stories turned in for one assignment.If there were 6 assignments during the semester,and the same number of students turned in Detective Stories for each assignment,what is the total number of Detective stories turned in during the semester.
如果图看不清的话..
Detective：20% Action-adventure：30% Mystery：25% Western：10% Horror：15%
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