求助pre数学几题-祝好人有好报！

dancingtear

关于各投票区人数的那个题。

假设人数最少的区有X人，那么剩下10个区的平均人数为(132,000-X)/10，人数最多的区则小于等于1.1X，
(132,000-X)/10<=1.1X，那么X>=11,000

不知道对不对。

Prep里有类似的题，例如
Last month 15 homes were sold in Town X. The avg. sale price of the homes was %150,000 and the median sale price was $130,000. Which of the following statements must be true?

I. At least one of the homes was sold for more than $165,000.
II. At least one of the homes was sold for more than $130,0000 and less than $150,000
III. At least one of the homes was sold for less than $130,000.

a) I only
b) II only
c) III only
d) I and II
e) I and III

kgbht

真是好人啊！！祝大家都考到自己想要的分！！