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
23
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
[originaltext]16.Iamnotgoingontheschooltripthisweekend.17.How
Thewomangettheadvertisementfromtheradio.[originaltext]M:Well,howdidy
Everyeducationsystemisinevitablyamirrorthatreflectsthecultureoft
Ihavebeenstudyingthenatureofthe"loweranimals"andcontrastingitwi
从A、 B、 C、 D四个图形中选出最合适的一个,使得它保持左边四个图形所
按照发行和募集方式不同,资本市场可以分为( ) Ⅰ.公募市场 Ⅱ.私募市场
患者男,70岁。冠心病住院10天后,出现咳嗽:咳痰。肺CT结果:肺炎。经验性给予
某女,42岁,经血淋沥不尽月余,气短懒言,食欲不振,面色苍白,脉细弱无力。
以行为主义为理论背景的是A.系统脱敏疗法 B.咨询者中心疗法 C.支持疗法
政府釆购工程进行招标时,投标人的下列因素中,不得作为资格要求或评审因素的有(
最新回复
(
0
)