作者ayupan (哈哈~~)
看板GMAT
标题Re: [计量] 两题有关GMAT problem solving的问题
时间Tue Feb 17 23:54:49 2009
※ 引述《skiptomylou3 (一条寂寞又无助的道路)》之铭言：
:
: 因为这两题是从对岸的一本书叫做"GMAT 汇编"上面看到的，
: 所以不知道标题要写什麽，所以如果有需要更改标题的再麻烦告知!
: 1.Month Average price per Dozen
: April $1.26
: May $1.20
: June $1.08
: The table above shows the average (arithmetic mean) price per dozen
: of the large grade A eggs sold in a certain store during three
: secessive months.If 2/3 as many dozen were sold in April as in May,
: and twice as many were sold in June as in April . What was the average
: price per dozen of the eggs sold over the three-month period?
: (1) $1.08
: (2) $1.10
: (3) $1.14
: (4) $1.16
: (5) $1.18 Ans:D
从题目得知
量的比 (2/3)May=April, (2)April=June
6April=4May=3June
化简之後 April:May:June=2:3:4
所以2x1.26+3x1.20+4x1.08=10.44(这里用的2,3,4是一个各月相对化简过的数量)
要算平均的单价所以 总价格/总数量(dozen) 10.44/9=1.16
故选D
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※ 编辑: ayupan 来自: 118.167.233.171 (02/17 23:56)
1F：推 skiptomylou3:感谢回答! 02/18 00:04