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数量关系之古典概率

2020-08-18 17:56:15  来源:中公事业单位考试题库
【导读】

中公事业单位为帮助各位考生顺利通过事业单位招聘考试!今天为大家带来数量关系:古典概率。

GAILVWENTISHIKAOSHIZHONGJINGCHANGCHUXIANDEYILEITIXING,XIANGJIAOYUPAILIEZUHEWENTI,GAILVWENTINANDUYAODI,DEFENYAOGENGJIARONGYI,SHIKAOSHIZHONGYINGDANGZHIDEZUODETIMU。ERQIZHONGDEGUDIANGAILVGENGSHIKAOSHIZHONGDEJINGDIANWENTI。

YI、GAINIANHEGONGSHI

ZHIDANGSUIJISHIJIANZHONGGEZHONGKENENGFASHENGDEJIEGUOJIQICHUXIANDECISHUDOUKEYIYOUYANYIHUOWAITUIFADEZHI,ERWUXUJINGGUORENHETONGJISHIYANJIKEJISUANGEZHONGKENENGFASHENGJIEGUODEGAILV。

SHIJIANAFASHENGDEGAILV:P(A)=SHIJIANAFASHENGDEQINGKUANGSHU/ZONGSHIJIANFASHENGDEQINGKUANGSHU

lol下注appLI1 YIGETOUZITOUZHILIANGCI,LIANGCITOUZHISUODEDESHUZIZHIHEWEIOUSHUDEGAILV?

A .DAYUERFENZHIYI B XIAOYUERFENZHIYI C. DENGYUERFENZHIYI D .BUQUEDING

【DAAN】C。JIEXI:SHOUXIANWOMENKEYIKAOLVZONGSHIQINGFASHENGDEQINGKUANGSHU,ZHILIANGCIGONG36ZHONGQINGKUANGSHU,RANHOUKAOLVHEWEIOUSHU,NEIMEKENENGDEQINGKUANGSHIQISHU+QISHUHUOSHIOUSHU+OUSHU。WOMENYIQISHU+JIAQISHUWEILI,DIYICIQISHUDEQINGKUANGYOU3ZHONG,DIERCITONGYANGSHI3ZHONG。SUOYIZHEIZHONGQINGKUANGYIGONGYOU9ZHONG。TONGYANGDEDAOLI,OUSHUJIAOUSHUYEYOU9ZHONG,SUOYIHEWEIOUSHUDEGONG18ZHONG,SHIJIANAFASHENGDEGAILVWEIERFENZHIYI。XUANC。

ER、JIETIFANGFA

(YI)MEIJUFA

LI1、MOUCIZHISHIJINGCAISHIJUANBAOKUO3DAOMEITI10FENDEJIALEITI,2DAOMEITI20FENDEYILEITIYIJI1DAO30FENDEBINGLEITI。CANSAIZHEZHAOMOUSUIJIXUANZEQIZHONGDEBUFENSHITIZUODABINGQUANBUDADUI,ZUIZHONGDEFENWEI70FEN。WENZHAOMOUWEIXUANZEBINGLEITIDEGAILVWEI( )

A.1/3 B.1/5 C.1/7 D.1/8

lol下注app【DAAN】D。JIEXI:YAORANGDEFENWEI70FEN,KEYIFEN3ZHONGQINGKUANG。,DI1ZHONGDAFAWEIJIALEI3TI,YILEI2TI;DIERZHONGWEIYILEI2TI,BINGLEI1TI;DI3ZHONGSANLEITIDOUXUAN,BING(30FEN),YILEI2XUANYI(20FEN),JIALEI3XUAN2(20FEN),GONGYOU2×3=6ZHONGDAFA。SUOYIZONGYANGBENSHIJIANZONGSHUWEI8,WEIXUANZEBINGDEZHIYOU1ZHONG,SUOYIGAILVWEI1/8。XUAND。

(ER)PAILIEZUHE

LI2MOUDANWEIDEHUIYISHIYOU5PAIGONG40GEZUOWEI,MEIPAIZUOWEISHUXIANGTONG。XIAOZHANGHEXIAOLISUIJIRUZUO,ZETAMENZUOZAITONGYIPAIDEGAILV( )

A.BUGAOYU15%

B.GAOYU15%DANDIYU20%

C.ZHENGHAOWEI20%

D.GAOYU20%

【答案】B。解析:事件发生的总的情况数40个座位选两个安排小李和小张即 ,让小张和小李安排同一排的情况,先从5排中选一排,再从每排的8个座位选出两个安排小李和小张即lol下注app, 所以做同一排的概率为280/1560=17.9%。选B。

DAOCIWOMENDUIGUDIANGAILVYOULEJIBENDERENSHI,ZHIXUZHANGWOJICHUDEPAILIEZUHEJIASHANGFENLEIFENBUDESIXIANGJIUNENGYOUXIAODEJIEJUEZHEILEIWENTI。

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