Re: [計量] 兩題有關GMAT problem solving的問題
※ 引述《skiptomylou3 (一條寂寞又無助的道路)》之銘言：
:
: 因為這兩題是從對岸的一本書叫做"GMAT 匯編"上面看到的，
: 所以不知道標題要寫什麼，所以如果有需要更改標題的再麻煩告知!
: 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
從題目得知
量的比 (2/3)May=April, (2)April=June
6April=4May=3June
化簡之後 April:May:June=2:3:4
所以2x1.26+3x1.20+4x1.08=10.44(這裡用的2,3,4是一個各月相對化簡過的數量)
要算平均的單價所以 總價格/總數量(dozen) 10.44/9=1.16
故選D
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◆ From: 118.167.233.171
※ 編輯: ayupan 來自: 118.167.233.171 (02/17 23:56)
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02/18 00:04, , 1F
02/18 00:04, 1F
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