首页
登录
职称英语
Your sock drawer contains ten pairs of white socks and ten pairs of black socks.
Your sock drawer contains ten pairs of white socks and ten pairs of black socks.
游客
2023-10-18
54
管理
问题
Your sock drawer contains ten pairs of white socks and ten pairs of black socks. If you’re only allowed to take one sock from the drawer at a time and you can’t see the color of the sock you’re taking until you’ve taken it, how many socks do you have to take before you’re guaranteed to have at least one matching pair?
选项
答案
Three socks.
解析
(假设第一次取到白色袜子,若第二次是白色则可配成一对;若是黑色需要继续取,第三次不论黑白均可与之前取到的袜子配成一对。所以至少两次,至多三次就可取到可配对的袜子。)
转载请注明原文地址:https://tihaiku.com/zcyy/3109242.html
相关试题推荐
Theproductcontainsno________colours,flavours,orpreservatives.A、fakeB、arti
Whichofthefollowingsentencescontainssubjunctivemood?A、Lucyinsistedthat
Whichofthefollowingcontainsasubjectclause?A、Thenewsthathewillleavef
Thebookcontains40poems,________werewrittenwhenhewasatcollege.A、mosto
TheEnglishlanguagecontainsa(n)______ofwordswhicharecomparativelyusedin
TheEnglishlanguagecontainsa(n)______ofwordswhicharecomparatively______us
TheEnglishlanguagecontainsa(n)______ofwordswhicharecomparatively______us
TheEnglishlanguagecontainsa(n)______ofwordswhicharecomparatively______us
Amanhas29socksinhisdrawer,9identicalblue,8identicalgreyand12iden
Amanhas53socksinhisdrawer:21identicalblue,15identicalblackand17i
随机试题
ConcreteAnotherthingtorememberinco
[originaltext]M:Goodmorning,DrHealy.Welcometo"TheyearstoCome".W:Tha
劳务企业施工作业人员进入现场后,项目部统一管理的“三证八统一”中的三证不包括(
下列哪项属于车道宽度的范围()。A.3.5m B.3m C.3.8m D
( )是利用现代的信息技术手段,借助传统的物资流通资源,实现物资的快速、准确、
质量检验计划是()。 A.对完成检验任务做出的口程安排 B.向用户提供证实
能够导致核酸分子Tm值升高的因素有( )。A.GC含量升高 B.溶液离子强度
建仓和平仓计算价差的方法应该保持一致,要用同一侧的价格做加减,才能恰当地比较价差
患者,女,49岁。身高164cm,体重55kg,因更年期月经不调,经药物治疗效果
工程项目试运行总结报告由()负责编制。A.建设单位 B.设计单位 C.
最新回复
(
0
)