作者a2515125 (Bobshih)
看板GMAT
標題[計量] 簡單數學疑惑
時間Wed Sep 2 18:34:02 2009
A certain company charges $6 per package to ship packages weighing
less than 2 pounds each. For a package weighing 2 pounds or more,
the company charges an initial fee of $6 plus $2 per pound.
If the company charged $38 to ship a certain package,
which of the following was the weight of the package, in pounds?
(A) 16
(B) 17
(C) 19
(D) 20
(E) 22
答案為A 我看了解釋(38-6)/2=16
我的解題為令N為pound 6+2N=38 N=16 原解是否忘記把6$ less than
2pounds算進去 答案不是應該 between 16~18ㄇ
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1F：推 MBIJ:你的算法會變成超過2磅的部份每磅加收6塊費用。可題目意思是 09/02 21:21
2F：→ MBIJ:只要超過2磅，每磅除了收2塊之外,基本費用6塊還是得付。 09/02 21:22
3F：→ MBIJ:我的理解是這樣啦...不知道對不對...最近算得很頭暈 09/02 21:23