北京pk10彩票玩法

您现在的位置:北京pk10彩票玩法 > 行测 > 数量关系 > 数学运算 >

行测备考“敲黑板”:公式法解决多次独立重复试验

2020-01-09 11:23:52| 来源:中公教育赵焦

概率问题是行测考试中非常常见的一个考点,也经常和排列组合结合着去出题,很多同学由于排列组合没有学明白遇到概率问题就直接选择放弃,直接蒙了一个选项就过了,但是其实有一类概率问题还是比较简单的,直接套用公式就能解决。接下来中公教育就带着大家一起学习概率问题中的多次独立试验。

YI、GAINIAN

ZAITONGYANGTIAOJIANXIAZHONGFUDI、GECIZHIJIANXIANGHUDULIDEJINXINGDEYIZHONGSHIYAN。ZAIZHEIZHONGSHIYANZHONG,MEIYICISHIYANZHIHUIYOULIANGZHONGJIEGUO,JIASHIJIANYAOMEFASHENG,YAOMEBUFASHENG,BINGQIEMEICIFASHENGDEGAILVDOUSHIXIANGTONGDE,GECISHIDULIDE,FASHENGDEGAILVXIANGHUZHIJIANMEIYOUYINGXIANG。

ER、TIXINGTEZHENG

北京pk10彩票玩法MOUZHONGSHIYANFASHENGDUOCI,MEIYICIZHIHUIYOULIANGZHONGJIEGUO,JIASHIJIANYAOMEFASHENGYAOMEBUFASHENG,BINGQIEMEICIFASHENGDEGAILVDOUSHIXIANGTONGDE。

SAN、JISUANGONGSHI

MOUYISHIYANDULIZHONGFUnCI,QIZHONGMEICISHIYANZHONGMOUYISHIJIANAFASHENGDEGAILVSHIp,NEIMESHIJIANACHUXIANkCIDEGAILVWEI:

SI、JINGDIANLITI

北京pk10彩票玩法LI1:MOUZHIYELANQIUYUNDONGYUANFALANMINGZHONGLVWEI80%,YICIBISAIZHONGTAFALAN5CI,WENTAQIAHAOMINGZHONG4CIDEGAILVSHIDUOSHAO?()

A.80% B.63.22% C.40.96% D.32.81%

DAAN:C

中公解析:由于该运动员每次投篮之间是互不影响的,相互独立,且投篮这一事件重复了5次,而命中的次数为4次,故根据多次独立重复实验的公式,可以列式为:

北京pk10彩票玩法LI2:JIA、YILIANGMINGPINGPANGQIUYUNDONGYUANJINXING3JU2SHENGDEBISAI,JIAMEIJUHUOSHENGDEGAILVJUNWEI80%,NEIMEJIAHUOSHENGDEGAILVSHIDUOSHAO?

A.25.6% B.64% C.89.6% D.96%

DAAN:C

ZHONGGONGJIEXI:ZHEISHIYIDAODUOCIDULIZHONGFUSHIYANYUBISAIWENTIJIEHEZAIYIQIDETIMU,ZHUYIZHEIZHONGYUBISAIXIANGJIEHEDETIMUYUDIYIDAOZHIJIETAOYONGGONGSHIDETIMUHAISHIYOUHENDAQUBIEDE,ZHEIDAOTIDETIGANYAOQIUSHI3JU2SHENGZHI,NEIMEYIWEIZHERUGUOQIAN2JUJUNSHENG,BISAIJIUJIESHULE。ERRUGUOXIANGDAWAN3JUCAIJIESHUBISAI,JIUYIWEIZHEQIAN2JUWEI1:1,ERDI3JUSHIJIASHENG。SUOYIZHEIDAOTIBAOHAN2LEIQINGKUANG。

DIYILEIJIUSHI80% *80% =0.64

第二类我们可以看出第3局结果固定,前2局才是公式的展现,则列式为

北京pk10彩票玩法ZEMANZUTIYIDEGAILVWEI64%+25.6%=89.6%,XUANC。

TONGGUOSHANGSHULIANGDAOTIMUDEFENXI,XIANGXINDAJIADUIDUOCIDULIZHONGFUSHIYANDEXIANGGUANTIMUYOULEYIDINGDELIJIE,YEXIWANGDAJIATONGGUOZHEILIANGDAOTIMUDEFENXIKEYIBADUOCIDULIZHONGFUSHIYANWENTINONGDONG,RUGUOZAIKAOSHIZHONGCHUXIANBATIMUZUODUI,ZHONGGONGJIAOYUXIWANGSHANGSHUJIANGJIEKEYIZHENZHENGBANGZHUDAODAJIA。

注:本站稿件未经许可不得转载,转载请保留出处及源文件地址。
(责任编辑:张珅)

推荐课程

MIANZESHENGMING:BENZHANSUOTIGONGSHITIJUNLAIYUANYUWANGYOUTIGONGHUOWANGLUOSOUJI,YOUBENZHANBIANJIZHENGLI,JINGONGGERENYANJIU、JIAOLIUXUEXISHIYONG,BUSHEJISHANGYEYINGLIMUDE。RUSHEJIBANQUANWENTI,QINGLIANXIBENZHANGUANLIYUANYUYIGENGGAIHUOSHANCHU。

备考工具
图书