首页
登录
职称英语
A certain store sells two types of pens: one type for $2 per pen and the other t
A certain store sells two types of pens: one type for $2 per pen and the other t
游客
2024-01-12
11
管理
问题
A certain store sells two types of pens: one type for $2 per pen and the other type for $3 per pen. If a customer can spend up to $25 to buy pens at the store and there is no sales tax, what is the greatest number of pens the customer can buy?
选项
A、9
B、10
C、11
D、12
E、20
答案
D
解析
It is fairly clear that the greatest number of pens that can be bought for $25 will consist mostly, if not entirely, of $2 pens. In fact, it is reasonable to begin by looking at how many of the $2 pens the customer can buy if the customer does not buy any $3 pens. It is easy to see that the customer could buy 12 of the $2 pens, with $1 left over.
If the customer bought 11 of the $2 pens, there would be $3 left over with which to buy a $3 pen. In this case, the customer could still buy 12 pens.
If the customer bought 10 of the $2 pens, there would be $5 left over. Only 1 of the $3 pens could be bought with the $5, so in this case, the customer could buy only 11 pens.
As the number of $2 pens decreases, the total number of pens that the customer can buy with $25 decreases as well. Thus the greatest number of pens the customer can buy with $25 is 12. The correct answer is Choice D.
转载请注明原文地址:https://tihaiku.com/zcyy/3355893.html
相关试题推荐
Ofcourseacertainamountofdependenceonothersisnotonlygood,butneces
Closingpricesforacertainstockwererecordedeachdayforaweekinthetabl
Acertainlabexperimentswithwhiteandbrownmiceonly.Inoneexperiment,2/3
Acertaintruckuses18gallonsofdieselfuelintraveling270miles.Inorder
Inacertaingame,eachplayerscoreseither2pointsor5points.Ifnplayers
Khalildrove120kilometersinacertainamountoftime.Whatwashisaveragesp
Eachofthefivedivisionsofacertaincompanysentrepresentativestoaconfer
Alltraineesinacertainaviatortrainingprogrammusttakebothawrittentest
Therewere36,000hardbackcopiesofacertainnovelsoldbeforethepaperbackv
Onthedayoftheperformanceofacertainplay,eachticketthatregularlysell
随机试题
[originaltext]EversinceMcDonald’sadoptedastrategyin2003thatfocuses
污秽等级Ⅱ的污湿特征:大气中等污染地区,轻盐碱和炉烟污秽地区,离海岸盐场3km~
证券公司、证券投资咨询机构在进行证券投资顾问业务推广和客户招揽时,不得有以下行为
剂型属于液体状的是A:煎膏剂B:茶剂C:稠膏剂D:干膏剂E:流浸膏剂
依据电流互感器运维细则管理规定,以下属于电流互感器出现二次回路开路现象的是(
Jb2232001.变压器带电检测项目有哪些?(5分)
2、高压试验工作不规范,造成一人触电死亡某日,某高试班在某220kV变电站进行新
关于耳蜗微音器电位的叙述,正确的是A.潜伏期极短 B.没有不应期 C.与声波
2×19年6月30日,甲公司由于一项投资失败发生财务困难,所欠乙公司的货款无法偿
某城市用地面积800平方公里,全市有公共交通线路通过的街道长度为2400公里,拥
最新回复
(
0
)