题目信息
Given that a is the average (arithmetic mean) of the first nine positive multiples of six and b is the median of the first twelve positive multiples of six, what is the ratio of a to b?
A:3:4
B:10:13
C:5:6
D:13:10
E:4:3
参考答案及共享解析

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已选答案:
正确答案:
B:10:13
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题目来源
Manhattan