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
2024-08-17
44
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/3723818.html
相关试题推荐
Yoursockdrawercontainstenpairsofwhitesocksandtenpairsofblacksocks.
Amanhas29socksinhisdrawer,9identicalblue,8identicalgreyand12iden
Amanhas53socksinhisdrawer:21identicalblue,15identicalblackand17i
随机试题
Whoseemstohaveeatentoomuch?[br]WhichofthesentencesisTRUE?A、Akemiar
Susan:Wow,Iloverelaxingafteralongdayofwork.Bob:Metoo!【D8】______Sus
InancientGreece,theOlympicGames______.[br]IntheearlydaysofancientO
路堤在结构上分为上路提和下路堤,上路堤是指路床以下()m厚度范围的填方部分。A
烧伤休克期,关于补液公式,正确的是A.烧伤面积的计算不包括I度烧伤 B.生理需
在总需求小于总供给时,中央银行要采取()货币政策。A.中性的 B.弹性的
证券公司从事证券经纪业务,客户资金不足而接受其买人委托的行为,应当给予的处罚有(
A.陈皮、枳实 B.木香、香附 C.香附、柴胡 D.沉香、川楝子 E.薤
水分通过植物气孔向外散发的现象称为( )A.升华 B.蒸腾 C.汽
通过艺术欣赏、艺术观摩,以及自身的艺术实践,使学生获得审美知识,树立正确的审美观
最新回复
(
0
)