首页
登录
职称英语
Excluding purchases by businesses, the average amount spent on a factory-new car
Excluding purchases by businesses, the average amount spent on a factory-new car
游客
2024-01-13
20
管理
问题
Excluding purchases by businesses, the average amount spent on a factory-new car has risen 30 percent in the last five years. In the average household budget, the proportion spent on car purchases has remained unchanged in that period. Therefore the average household budget must have increased by 30 percent over the last five years. Which of the following is an assumption on which the argument relies?
选项
A、The average number of factory-new cars purchased per household has remained unchanged over the last five years.
B、The average amount spent per car by businesses buying factory-new cars has risen 30 percent in the last five years.
C、The proportion of the average household budget spent on all car-related expenses has remained unchanged over the last five years.
D、The proportion of the average household budget spent on food and housing has remained unchanged over the last five years.
E、The total amount spent nationwide on factory-new cars has increased by 30 percent over the last five years.
答案
A
解析
在解答本题时一定要注意数量关系的变化,我们可以借助简单的数学公式加以推导,设一个家庭开始时在每辆汽车上的花费为x,平均购买汽车数为n,家庭预算为y;在变化后这三项数值分别为x’,n’,y’。则根据本题中的描述,我们很容易得出三个等式,即①:x’=1.3x,②:y’=1.3y,③:nx/y=n’x’/y’。把①、②式同时代入③式,得出n=n’,即每个家庭在这5年当中,平均购买汽车的数量不变。由此分析可知,要使本题的结论成立,那它一定是以(A)选项所描述的内容为assumption。
转载请注明原文地址:https://tihaiku.com/zcyy/3358741.html
相关试题推荐
ThreedifferentlumberjackscanchopWamountofwoodin30minutes,45minutes,
Acaraverages40milesperhourforthefirst6hoursofatripandaverages60
Ofthenumbersq,r,s,andt,whichisgreatest?(1)Theaverage(arithmeticme
StateXhasasalestaxrateofkpercentonallpurchasesandStateYhasasal
Khalildrove120kilometersinacertainamountoftime.Whatwashisaveragesp
Federaleffortstoaidminoritybusinessesbeganinthe1960’swhentheSmallBu
Whenairlineswerederegulatedinthe1970s,theaveragepriceofaticketwas$
Federaleffortstoaidminoritybusinessesbeganinthe1960swhentheSmal
Federaleffortstoaidminoritybusinessesbeganinthe1960swhentheSmal
Federaleffortstoaidminoritybusinessesbeganinthe1960swhentheSmal
随机试题
[originaltext]W:Hi,Sam,IhatetobotheryoubutIwonderifIcouldhaveaw
CreativeDestructionofHigherEducationA)Highereducationiso
Whatcanwelearnfromthesurvey?[br][originaltext]Washington—Asurveysaid
下列哪项属于近部选穴A、头痛取膈俞 B、脱肛取百会 C、咳嗽取列缺 D、鼻
2009~2012年间全国商品进出口总额最高年份,矿产品进出口总额比
修补处于高流速区的表层缺陷,为保证强度和平整度,减少砂浆干缩,可采用( )。
A.脑干出血 B.蛛网膜下腔出血 C.高血压危象 D.脑梗死 E.脑栓塞
凡是个别次要部件或次要试验项目不合格,尚暂不影响安全运行或影响较小,外观尚可,主
附着于牙表面的口腔上皮为A.结合上皮 B.附着龈上皮 C.龈沟上皮 D.龈
公众责任保险的责任范围,观展者某A在古董珍玩展厅观赏拍品,当其近前观看某古董时,
最新回复
(
0
)