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
The map above shows the trails through a wilderness area. If travel is in the direction of the arrows, how many routes along the
The map above shows the trails through a wilderness area. If travel is in the direction of the arrows, how many routes along the
admin
2022-10-18
26
问题
The map above shows the trails through a wilderness area. If travel is in the direction of the arrows, how many routes along the marked trails are possible from point A to point 8?
选项
A、11
B、18
C、54
D、108
E、432
答案
C
解析
It is clear that the number of routes from point A to point B that begin by going up from point A ("up" relative to the orientation of the map) is the same as the number of routes from point A to point B that begin by going down from point A. Therefore, we only need to determine the number of routes from points to point B that begin by going up and then double the result.
To determine the number of routes that begin by going up from point A,we can apply the Multiplication Principle. There are 3 locations at which branches occur. Moreover, at each of these locations, there are 3 different trails that can be taken. Finally, the choices of which trail to take at each location can be made independently. Therefore, the Multiplication Principle applies and we get (3)(3)(3) = 27 for the number of routes that begin by going up from point A. Hence, the number of routes from point A to point B is 2(27) = 54.
The correct answer is C.
转载请注明原文地址:https://kaotiyun.com/show/WttO777K
本试题收录于:
GMAT QUANTITATIVE题库GMAT分类
0
GMAT QUANTITATIVE
GMAT
相关试题推荐
Mancannotgoonincreasinghisnumberatthepresentrate.Inthenext30yearsmanwillfaceaperiodofcrisis.Someexperts
WashingtonIrvingwasAmerica’sfirstmanofletterstobeknowninternationally.Hisworkswerereceivedenthusiasticallyboth
Whatheis()isneithermoneynorfame,butthesatisfactionofseeinghisstudentsgrowupasbuildersofsocialism.
Atfirsttheinstituterefusedtopurchasethetelescope,butthisdecisionwas()revised.
SpeakerA:IfIamnotmistaken,yourbirthdayiscomingup.Hasyourbrothersentyouanything?SpeakerB:Notyet.______.
Televisionhasopenedwindowsineverybody’slife.Youngmenwillneveragaingotowarastheydidin1914.Millionsofpeople
Whatdowemeanbyasatisfactorystandardofliving?Obviously,itmustincludethebasicnecessitiesoflifesuchasfood,clo
SpeakerA:Whatasurprise!Youchangedyourhairstyle.SpeakerB:Yes,andanothersurprise,I’mgoingtogetmarriednextSat
Whatdowemeanbyasatisfactorystandardofliving?Obviously,itmustincludethebasicnecessitiesoflifesuchasfood,clo
Theareaofarectangularflooris56squarefeet.Ifboththelengthandthewidthoftherectangularfloorareintegers,thel
随机试题
消化性溃疡合并大出血的特点,错误的是()。
孕妇血清人绒毛膜促性腺激素(hCG)浓度达高峰是在妊娠
哪项是毕工式胃大部切除术的优点()
中药七情配伍中的增毒配伍是
中央投资项目招标代理机构资格证书的有效期为()年。
在个别资本成本的计算中,不用考虑筹资费用影响因素的是()。
在认知心理学中,可以把问题解决定义为具有一系列目标指向性的认知操作,它具备的特征有()。
任何无法量化及不设定时限的目标都是无效的目标,而任何无效的目标都没有实际操作的方法。因此,详细的职位规划不是无法量化及不设定时限的目标。为使上述论证成立,必须补充以下哪项作为前提?
设μ=f(x2+y2,xz),z=z(x,y),由ex+ey=ez确定,其中f二阶连续可偏导,求。
【B1】【B5】
最新回复
(
0
)