Problem Solving

试题详情

题目:

In a small town, 16 people own Fords and 11 people own Toyotas. If exactly 15 people own only one of the two types of cars, how many people own both types of cars.

选项:

A、2
B、6
C、7
D、12
E、14

答案:

B

提问:

可是感觉应该是12 啊
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提问:

我算出来12,答案是6
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