首页
外语
计算机
考研
公务员
职业资格
财经
工程
司法
医学
专升本
自考
实用职业技能
登录
外语
There are 20 classes in School Y. The number of students in each class is either 27 or 28. Now the school plans to set one extra
There are 20 classes in School Y. The number of students in each class is either 27 or 28. Now the school plans to set one extra
admin
2019-10-11
41
问题
There are 20 classes in School Y. The number of students in each class is either 27 or 28. Now the school plans to set one extra class such that the average number of students in each class is 0.5 less than before. What is the number of students in the extra class? ________.
选项
答案
17
解析
设20个班平均学生数为X有27<X<28,原来的总人数为20X。而新加的班的学生数是21(X-0.5)-20X,化简后为X=10.5。因为27<X<28,所以16.5<X-10.5<17.5。又因为人数必须是整数,所以答案是17。
转载请注明原文地址:https://kaotiyun.com/show/xSkO777K
本试题收录于:
GRE QUANTITATIVE题库GRE分类
0
GRE QUANTITATIVE
GRE
相关试题推荐
Expertssuggestusingadifferentpasswordforeverywebsiteyouvisit,andchangingthepasswordeveryfewmonths.Ittakestro
Mysterynovelssellthousandsofcopieseachyear.Andmany【C1】______countAgathaChristieamongtheirfavoriteauthors.Christi
AsTheplanecircledovertheairport,everyonesensedthatsomethingwaswrong.Theplanewasmovingunsteadilythroughtheair
Passer-by:______Localresident:Sure.It’sonElmStreet,betweenEleventhandTwelfthAvenue.
Whatdowemeanbyasatisfactorystandardofliving?Obviously,itmustincludethebasicnecessitiesoflifesuchasfood,clo
Whatdowemeanbyasatisfactorystandardofliving?Obviously,itmustincludethebasicnecessitiesoflifesuchasfood,clo
Solvetheproblemandindicatethebestoftheanswerchoicesgiven.NUMBERS:Allnumbersusedarerealnumbers.FIGURES:
Inthefigureattheright,thelegsoffighttriangleACBarediametersofthetwosemicircles.IfAB=4,whatisthesumoft
在平面直角坐标系中,点B与点A关于直线y=x对称,点C与点B关于x轴对称。如果点A坐标是(2,3),那么点C的坐标是多少?
求30,50,60最小公倍数。
随机试题
A.玫瑰疹B.鸡皮样红色皮疹C.黏膜疹D.荨麻疹E.水疱疹麻疹早期可见
知识产权是权利人就其智力劳动成果而享有的权利,包括______、商标和专利权。
________,春在溪头荠菜花。(辛弃疾《鹧鸪天代人赋》)
由桑叶、杏仁、人参、石膏、甘草、胡麻仁、阿胶、麦门冬、枇杷叶组成的方剂是
有消食健胃、涩精止遗功效的是
当公司实际增长率超过可持续增长率时,公司必然需要贷款。()
下列关于被子植物果实发育的叙述,正确的是()。
“拉美陷阱”,即20世纪70年代以来,在拉美国家内由贫富不均、两极分化、城市化失衡造成环境恶化、失业人口较多、公共服务不足的现象。某些西方经济学家预言,中国可能会陷入“拉美陷阱”。下列举措有利于我国避免“拉美陷阱”的是()。①降低中低收入者的税收
请按下面注释的提示将类B的构造函数定义补充完整。classA{inta;public:A(intaa=0){a=aa;}};classB:publicA{
______youliketohavedinnerwithustonight?
最新回复
(
0
)