题库搜索>问题求解PS-17786
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A merchant paid ＄300 for a shipment of x identical calculators. The merchant used two of the calculators as demonstrators and sold each of the others for ＄5 more than the average (arithmetic mean) cost of the x calculators. If the total revenue from the sale of the calculators was ＄120 more than the cost of the shipment, how many calculators were in the shipment?
分析A选项
分析B选项
分析C选项
分析D选项
分析E选项
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（x-2）（300/x+5）=420 → x²-26x-120=0 → (x-30)(x+4)=0
x=30
小良冠二郎
如何可以在90s內算好...
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2023-05-12 23:11:19
小良冠二郎
a shipment of 一批
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2023-05-12 23:00:45
219619wi
其实这题题目不清楚，也有个解法, x-2 可以被420整除，只有30
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2023-04-10 16:29:29
GMAC是猪猪
我以为运输成本只是产品成本的一部分……
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2023-03-13 04:30:28
Zoeee_QT
"A merchant paid $300 for a shipment of x identical calculators" means that there was a shipment of x calculators which cost merchant $300. The average cost of each calculator is 300/x ; The average price of each calculator is 300/x+5 ; Number of calculators sold is x−2 ; The total revenue is 300+120=420 ; So, (x−2)∗(300/x+5)=420 At this point it's better to substitute values. Answer choice E fits: (30−2)∗(30030+5)=28∗15=420 Answer: E.
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2022-09-20 16:06:53
墨殊
题目说”a shipment of ",指运输费用；"total revenue"，意思是总收入，不是profit, 理解不对傻算再久也没用
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2022-08-16 21:42:44
hyf1367
a shipment of，一批货。
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2022-05-21 13:51:30
Crystal8
啥子烂题目哦，表达得太无语了。。。。。
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2021-12-09 17:09:41
学不下去太难了
used two of the calculators as demonstrators，用两个展示，所以售卖的个数为x-2
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2021-08-04 20:43:01
Horacejin
paid ＄300 for a shipment -------the average (arithmetic mean) cost of the x calculators 真的表达到位。。。。
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2020-07-31 18:34:19
可欣同学
cost指运输cost不是指生产cost啊，受不了
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2020-07-31 11:46:46
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问题求解PS
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GMAT难题300合集
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