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
2024-01-13
69
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/3360185.html
相关试题推荐
Savingenergymeanssavingmoney.Homeownersknowthisbasicfact,butthey
Savingenergymeanssavingmoney.Homeownersknowthisbasicfact,butthey
Themulti-billion-dollarWesternpopmusicindustryisunderfire.Itisbe
Themulti-billion-dollarWesternpopmusicindustryisunderfire.Itisbe
Ifyoucontinuetoeatjunkfood,you’11______sickandoverweight.A、giveinB、g
W:Excuseme,doyouhavesomechangeforadollar?M:______A、Whydoyouwantt
Mymoney______.ImustgotothebanktodrawsomeofmysavingsoutbeforeI’ve
Evenifparentsnolongerlivetogether,theyeachcontinuetobe______fortheir
Evenifparentsnolongerlivetogether,theyeachcontinuetobe____________for
Ifxdollarsareinvestedat12percentforoneyearandydollarsareinvested
随机试题
标准编号为GB50086-2001是()。A.冷弯薄壁型钢结构技术规范 B.
关于违约金,下列说法正确的有( )。A.违约金属于约定的违约责任形式 B.违
哪一部位的骨折宜采用大悬臂带固定?( )A.锁骨骨折 B.肱骨骨折 C.尺
根据下面资料,回答 Germsareeverywhere.Youcan
患者自己扪及下腹肿块多为A.宫颈肌瘤 B.浆膜下肌瘤 C.肌壁间肌瘤 D.
患者,男,28岁。外出感寒,左下肢痛,遇风则疼痛加剧,舌苔薄白。用药应首选的药物
教师:学生 A.丈夫:妻子 B.出版商:读者 C.商家:客户 D.警
中国古代发明指南针、造纸术、印刷术和火药,是中国古代文明的标志性成就,深刻影响中
某天然地基fsk=100kPa,采用振冲挤密碎石桩复合地基,桩长l=10m,桩径
下列土层中,采用高压喷射注浆加固效果最好的是()。A.淤泥质土 B.含石块土
最新回复
(
0
)