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A certain city with a population of 132,000 is to be divided into 11 voting districuts, and no district is to have a population that is more than 10% greater than the population of any other district. What’s the Minimum possible population that the least populated distirct could be?
A.10,700
B.10,800
C.10,900
D.11,000
E.11,100
我的思路：假设最大的为X,最小的为Y, 据题意应有：
X-Y<=0.1Y, 则
Y>=1.1X
可为什么就能得出11,000的答案呢？难道就是为了取整？这也太牵强了吧？
紧急求助！多谢! |
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发表于 2010-3-28 11:04:44
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