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标题: prep-ds-73 [打印本页]

作者: tongxiaolong    时间: 2009-12-6 20:42     标题: prep-ds-73

what is the  average of eleven consecutive integers?

(1)the average of the first nine integers is 7

(2)the average of the last nine integers is 9

我想问下这个说的consecutive integer一定是有排列顺序的么?是从小到大还是从大到小?


作者: tangdream    时间: 2009-12-7 07:21

都可以,这个题干无关紧要

考点在选项

一旦数列定下来,答案就定下来了

D


作者: tongxiaolong    时间: 2009-12-8 06:52

 感谢LS回答




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