prep-ds-73

tongxiaolong

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？

tongxiaolong

 感谢LS回答

tangdream

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