首页
登录
职称英语
[img]2015m7x/ct_egreqm_egreqtbz1_0075_20153[/img]In the winter, 2/3 of the card
[img]2015m7x/ct_egreqm_egreqtbz1_0075_20153[/img]In the winter, 2/3 of the card
游客
2025-02-24
42
管理
问题
In the winter, 2/3 of the cardinal sightings, 1/2 of the junco sightings, and 1/4 of the sparrow sightings were in January. What fraction of the total number of sightings of these three bird species in the winter were in January?
选项
A、
B、
C、
D、
E、
答案
C
解析
The total number of sightings of cardinals, juncos, and sparrows in the winter was 30+12 + 20, or 62. In the question, you are given that 2/3 of the 30 cardinal sightings, 1/2 of the 12 junco sightings, and 1/4 of the 20 sparrow sightings were in January. Therefore the number of sightings of these three bird species in January was
, or 31, which accounted for 31/62, or 1/2, of the total number of sightings of these three bird species in the winter. Thus the correct answer is Choice C.
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/3970274.html
相关试题推荐
[img]2014m9x/ct_egreqm_egreqbj_0056_20148[/img][br]CInthisquestion,youare
[img]2015m7x/ct_egreqm_egreqtbz1_0075_20153[/img]Inthewinter,2/3ofthecard
[img]2015m7x/ct_egreqm_egreqtbz1_0073_20153[/img]Eachofthepeopleinthreegr
[img]2015m7x/ct_egreqm_egreqjs_0071_20153[/img]PointsAandBareshowninthe
Itxandyareintegersandx=[img]2015m7x/ct_egreqm_egreqjs_0043_20153[/img],
[img]2014m9x/ct_egreqj_egreqtbz1_0250_20148[/img]Thefigureaboveshowsanorma
[img]2014m9x/ct_egreqj_egreqtbz1_0250_20148[/img]Thefigureaboveshowsanorma
If[img]2015m7x/ct_egreqj_egreqjs_0067_20151[/img],whichofthefollowingstatem
Whichofthefollowingisequalto[img]2015m7x/ct_egreqj_egreqjs_0064_20151[/img
Compute[img]2015m7x/ct_egreqj_egreqjs_0029_20151[/img].-0.2528571ExplanationSin
随机试题
【31】[br]【38】[originaltext]Lecturer:We’regoingtolooktodayatsomeexp
[originaltext]W:Hello,Michael.Wouldyoucometomyofficeforaminute?Iwa
C
在面向对象技术中,()说明一个对象具有多种形态。A.继承 B.组合 C
羊鸣是歌剧《江姐》的曲作者之一。( )
《公路水运工程试验检测机构等级证书》有效期为()年。A.3 B.4 C
简述CARS的各项指标。
治疗眩晕肝阳上亢证,应首选( )。A.天麻钩藤饮 B.四逆散 C.通窍活血
A.二巯丙醇 B.依地酸钙钠 C.盐酸戊乙奎醚 D.单价抗毒血清 E.亚
库存枸橼酸钠血,一般超过几周不宜再用A.3周 B.4周 C.6周 D.8周
最新回复
(
0
)