题目信息
The 7th grade French and Spanish classes each have 15 students in them, and there are five students in the 7th grade taking both languages. If everyone in the 7th grade is in at least one of the two language classes, how many students are taking just one of the two classes?
A:5
B:10
C:15
D:20
E:25
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正确答案：
D:20
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题目来源
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