首页
登录
职称英语
If the average(arithmetic mean)of 7 consecutive numbers is 16, what is the sum o
If the average(arithmetic mean)of 7 consecutive numbers is 16, what is the sum o
游客
2024-01-12
39
管理
问题
If the average(arithmetic mean)of 7 consecutive numbers is 16, what is the sum of the least and greatest of the 7 integers?
选项
A、13
B、14
C、16
D、19
E、32
答案
E
解析
The correct answer is E. To solve this problem, first set the least of the seven values to x. When the least of the seven numbers is x, the remaining numbers are x+1, x+2, x+3, x+4, x+5, and x+6, because the numbers are consecutive. Because the average of the seven numbers is 16, then[x+(x+l)+(x+2)+(x+3)+(x+4)+(x+5)+(x+6)]divided by 7 = 16. Solve for x:
(7x + 21)/7= 16
7x+21 = 112
7x=91
x=13
The smallest number, x, is 13, and the largest number is x+6. Therefore the largest number is equal to 13+6, or 19, and the sum of these two numbers is 13 + 19, or 32.
转载请注明原文地址:https://tihaiku.com/zcyy/3356073.html
相关试题推荐
Thesumofthenon-primenumbersbetween40and50,non-inclusive,isA、131B、176
If[img]2011q3/ct_egmatqm_egmatqchoose_0454_201121[/img]forallnumbersq,r,s
Atypeofextra-largeSUVaverages12.2milespergallon(mpg)onthehighway,b
Foranynumberswandz,w·z=w3z(8-w2).Ifbothzandw·zarepositivenumbers,
Iftheaverage(arithmeticmean)ofaandbis110,andtheaverageofbandci
Foranynumbersaandb,ab=ab(3-b).Ifaandabbothrepresentpositivenumbers
ListA,BandCmeansthelistofmultiplesofprimenumbers2,3,and5respect
Eachof5positivewholenumbersisatleast8.Theaverage(arithmeticmean)oft
Howmany3-digitnumbersbetween100and200haveadigitthatistheaverageof
Acaraverages40milesperhourforthefirst6hoursofatripandaverages60
随机试题
[originaltext]Theearliestprocessofmakingpaperwasdonealmost5000yea
"Tear’emapart?"Killthefool!""Murderthereferee(裁判)!"Theseare
Thelongyearsoffoodshortageinthiscountryhavesuddenlygivenwaytoa
[originaltext](1)GunmenhavestormedauniversityinnorthwestPakistanwh
利息作为借人货币的代价或贷出货币的报酬,实际上就是借款资金的“成本”。()
IwastakingatraintoLondon′sVictori
盐酸普萘洛尔属于A.α受体拮抗剂 B.α+β受体拮抗剂 C.α受体激动剂
动机的功能有A.指向功能 B.激发功能 C.维持功能 D.调节功能
以自有运输工具从事的面向本企业、本单位内部的运输活动,称为()。 A.生产过程
投资项目决策分析与评价的基本要求包括贯彻落实科学发展观、资料数据准确可靠和()
最新回复
(
0
)