2. 外语
  3. In a class of 120 students, 60 percent can speak French and the rest can speak only English. If 25 percent of those in the class

In a class of 120 students, 60 percent can speak French and the rest can speak only English. If 25 percent of those in the class

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问题 In a class of 120 students, 60 percent can speak French and the rest can speak only English. If 25 percent of those in the class who can speak French can also speak English, how many of the students in the class can speak English?
选项 A、54
B、60
C、66
D、84
E、90
答案C
解析 某个班级有120名学生，其中有60%的学生讲法语，其余的学生人只会讲英语。若讲法语的学生中有25％的学生也可以讲英语，问该班级中有多少人会讲英语?
解：本题的正确答案是(C)。班级里讲法语的学生中有25％的学生会讲英语，则会讲英语的学生总数为：120×60％×25％+120×40％=66
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