Re: [計量] Prep Test1
看板GMAT (GMAT入學考試)作者reznor (Hear No Evil)時間17年前 (2007/12/04 16:43)推噓0(0推 0噓 0→)留言0則, 0人參與討論串2/3 (看更多)
※ 引述《mildblue (北極融化中)》之銘言:
: A certain city with a population of 132,000 is to be divided into 11 voting
: districts, and no district is to have a population that is more than 10
: percent greater than the population of any other district, what is the
: minimum possible population that the least populated district could have?
: (1)10,700
: (2)10,800
: (3)10,900
: (4)11,000
: (5)11,100
: Ans:4
: 我怎麼算都是10,800
: 請各位幫忙,謝謝 ^^
假設最小的選區人口為a
a最小的狀況就是當其他十個選區都剛好比a多10%
a + (1.1a) x 10 = 132000
a = 11000
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