首页
登录
职称英语
[img]2015m7x/ct_egreqm_egreqtbz1_0073_20153[/img]Each of the people in three gr
[img]2015m7x/ct_egreqm_egreqtbz1_0073_20153[/img]Each of the people in three gr
游客
2024-01-12
59
管理
问题
Each of the people in three groups gave a rating of Product X on a scale from 1 through 5. For each of the groups, the table above shows the number of people in the group and the average(arithmetic mean)of their ratings. What is the average of the ratings of the product given by the 100 people in the three groups combined?
Give your answer to the nearest 0.1.
选项
答案
4.1
解析
For each of the three groups, the sum of the ratings given by the people in the group is equal to the number of people in the group times the average of their ratings. Therefore the sum of the ratings given by the 100 people in the three groups combined is 45(3.8)+ 25(4.6)+ 30(4.2), or 412, and the average of the 100 ratings is 412/100, or 4.12. Therefore, to the nearest 0.1, the correct answer is 4.1.
This explanation uses the following strategies.
Strategy 1: Translate from Words to an Arithmetic or Algebraic Representation
Strategy 4: Translate from a Figure to an Arithmetic or Algebraic Representation
转载请注明原文地址:https://tihaiku.com/zcyy/3355711.html
相关试题推荐
Tobementallyhealthy,peoplemusthaveself-respect.Peoplecanmaintainself-
Inastudyofmorethan8,000peopleusingtenbeachesontwooftheGreatLakes
Tom:Employerscomplainthatpeoplegraduatingfromhighschooltoooftenlackt
Peoplehavediscoveredtheprinciplesofsolarenergywheneverfuelbecomesscar
ItappearsillogicaltosomepeoplethatWestGermany,whichbanssuchseemingl
Asaresultofthecontinuingdeclineinthebirthrate,lesspeoplewillenter
Asmoreandmorepeopleinvesttheirmoneyinsavingscertificatesormoney-mark
Seemingtobetheonlyorganizationfightingfortherightsofpoorpeopleinth
Fewpeoplerealizethatthechanceofaccidentalinjuryordeathmaybeasgreat
Freedman’ssurveyshowedthatpeoplelivinginsmalltownsandruralareasconsi
随机试题
Inthemidstofaperiodofrapidlanguageextinction,withalanguageestim
Chaplinwasnotjustagenius;hewasamongthemost______figuresinfilmhist
1.题目:七年级下册《春夜洛城闻笛》片段教学 2.内容: 3.基本要求:
根据《企业会计准则—非货币性资产交换》的规定,下列各项中,可视为具有商业实质的有
Thechangeinthatvillagewasmiraculou
关于脑死亡的哈佛标准有四个具体基本标准。下列中不属于这四个具体基本标准的是A.自
用绝缘棒拉合隔离开关(刀闸)、高压熔断器或经传动机构拉合断路器(开关)和隔离开关
具有滋阴养血、益气温阳、复脉定悸作用的方剂是 A.归脾汤 B.八珍汤 C.
基础心理学是研究()。 (A)正常成人心理现象的心理学基础学科 (B
下列措施中,不属于预防岩溶塌陷的是( )。A.塌洞回填 B.控制地下水开采
最新回复
(
0
)