首页
登录
职称英语
A man has 29 socks in his drawer, 9 identical blue, 8 identical grey and 12 iden
A man has 29 socks in his drawer, 9 identical blue, 8 identical grey and 12 iden
游客
2023-10-17
39
管理
问题
A man has 29 socks in his drawer, 9 identical blue, 8 identical grey and 12 identical black. The lights have fused and he is completely in the dark. How many socks must he take out to make certain that he has a pair of each colour?
选项
A、21.
B、14.
C、23
D、24
答案
C
解析
每种颜色有两只,在完全黑暗的情况下,三种颜色完全看不出来,只有去算最大化的可能,即12+9+2=23,只有这样才能保证每种颜色有2只。所以选项C正确。
转载请注明原文地址:https://tihaiku.com/zcyy/3105621.html
相关试题推荐
Yoursockdrawercontainstenpairsofwhitesocksandtenpairsofblacksocks.
Amanhas29socksinhisdrawer,9identicalblue,8identicalgreyand12iden
Amanhas53socksinhisdrawer:21identicalblue,15identicalblackand17i
随机试题
Inthe90’srecession.A、Richard’sbosshadonlyonecustomerforayear.B、tailo
IwenttoadepartmentstoresoonafterarrivinginJapanandwasshockedatthe
Debateswithinthesocialscienceshave______anintellectualspacewhichhas.A
UnusualincidentsarebeingreportedacrosstheArctic.Inuitfamiliesgo
Inmanywayswecanallbeencouragedtolearnanotherlanguage.Althoughit
风湿性心瓣膜病患者出现下列哪种征象应首先考虑并发感染性心内膜炎的可能?()A.
既治脘腹冷痛,又治虫积腹痛的药物是A.附子 B.干姜 C.肉桂 D.花椒
刘先生准备将部分资金投资于可转换公司债券,关于可转换公司债券下列说法不正确的是(
中国证券登记结算公司为证券交易提供集中()服务。A:经纪B:存管C:登记D
检查白细胞15000/mm3。此情况可能是发生了A.咬肌痉挛 B.翼内肌痉
最新回复
(
0
)