首页
登录
职称英语
Alan and Sue have each been saving one dollar a day and will continue to do so f
Alan and Sue have each been saving one dollar a day and will continue to do so f
游客
2025-02-27
21
管理
问题
Alan and Sue have each been saving one dollar a day and will continue to do so for the next month. If Sue began saving several days before Alan, in how many days from today will Alan have saved one-half as much as Sue?
(1) As of today, Alan has saved 7 dollars and Sue has saved 27 dollars.
(2) Three days from today, Alan will have saved one-third as much as Sue.
选项
A、Statement (1) ALONE is sufficient, but statement (2) alone is not sufficient.
B、Statement (2) ALONE is sufficient, but statement (1) alone is not sufficient.
C、BOTH statements TOGETHER are sufficient, but NEITHER statement ALONE is sufficient.
D、EACH statement ALONE is sufficient.
E、Statements (1) and (2) TOGETHER are NOT sufficient.
答案
A
解析
Let A be the amount Alan has saved as of today. Let S be the amount Sue had already saved when Alan started saving. Then, as of today, Sue has saved S + A dollars. Determine d,the number of days from today that Alan will have saved half as much as Sue. That is, determine d,where A + d = (S + A + d)/2 or, after algebraic manipulation, determine d such that d= S-A.
(1) It is given that A = 7 and S = 27, so d= 20; SUFFICIENT.
(2) It is given that three days from today, Alan will have saved one-third as much as Sue, from which it follows that A + 3 = (S + A + 3)/3 or, after algebraic manipulation, S = 2A + 6. Then, d=S-A=(2A+6)-A = A+6. Since the value of A can vary, the value of d cannot be determined; NOT sufficient.
The correct answer is A;
statement 1 alone is sufficient.
转载请注明原文地址:https://tihaiku.com/zcyy/3974747.html
相关试题推荐
AlanandSuehaveeachbeensavingonedollaradayandwillcontinuetodosof
Exactly3depositshavebeenmadeinasavingsaccountandtheamountsofthede
Therecentdeclineinthevalueofthedollarwastriggeredbyapredictionofs
Thepriceofmaplesyruphasjumpedfrom22dollarsagallonthreeyearsagoto
ItwouldcostRosetownonemilliondollarstorepairallofitsroads.Intheye
Iftheivorytradecontinues,expertsbelieve,theelephantwillsoonbecomeext
Althoughfruitcannolongergrowonceitispicked,itcontinuesforsometime
Ratherthancontinuetoproducemostoftheitemsnecessaryforsubsistence,ag
Ifindustrialpollutioncontinuestodepletetheozonelayer,theresultingincr
Eventhoughthestatehasspenttenyearsandsevenmilliondollarsplanningar
随机试题
Itisthevision(设想)ofthePublicTransitPoliceDepartmenttoachieveat
下面你将听到一段有关人口老龄化问题的讲话。[originaltext]Theworld’spopulationisageing:virtua
Incertaincountriesthelaw______parentstosendtheirchildrentoschool.A、i
西瓜霜的功效是A.润燥软坚 B.泻热通便 C.清热泻火,消肿止痛 D.下气
善于治疗肝阳上亢兼血热吐衄的药物是A.天麻 B.羚羊角 C.代赭石
某牙膏企业几十年来一直只生产牙膏,产品质量卓越,顾客群体稳定。目前为扩大经营规模
在小组后期,小组工作者鼓励组员之间的互相尊重与关怀,协助他们更好地认识自己,并通
与受体有很高亲和力,但内在活性不强(a
证券市场线可以用来描述市场均衡条件下单项资产或资产组合的必要报酬率与风险之间的关
心理治疗的性质是A.对人格的改造与纠正 B.有效、有益和人道的心理干预 C.
最新回复
(
0
)