题目信息
Six children-A, B, C, D, E, and F-are going to sit in six chairs in a row. Child E must be somewhere to the left of child F. How many possible configurations are there for the children?
A:60
B:180
C:240
D:360
E:720
参考答案及共享解析

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已选答案:
正确答案:
D:360
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题目来源
Magoosh