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2017/08/08/intresting1

Open utterances-bot opened this issue 4 years ago • 7 comments

【趣味小题】酒鬼90%几率去酒吧. | 郭飞的笔记

https://www.guofei.site/2017/08/08/intresting1.html

utterances-bot avatar Jan 15 '20 14:01 utterances-bot

楼主,不好意思,请教点事情啊,如果去每家酒家的概率都相等,总概率是0.9,每个酒家的概率P(A)=0.3,不在该酒家的概率应该是1-0.3=0.7,同时不在俩家的概率不是0.7*0.7=0.49么,为啥是0.4啊?

bill831231 avatar Jan 15 '20 14:01 bill831231

这不是重复抽样,不应当用乘法

guofei9987 avatar Jan 16 '20 07:01 guofei9987

这个0.4是怎么来的呀 Mit freundlichen Grüßen Wu,Peng

郭飞 [email protected] 于2020年1月16日周四 上午8:06写道:

这不是重复抽样,不应当用乘法

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bill831231 avatar Jan 16 '20 07:01 bill831231

1-(0.3+0.3)

guofei9987 avatar Jan 17 '20 02:01 guofei9987

感觉如果这俩个是独立的关系,那么和剩下的也应该不存在条件关系了呀 或者说如果PA和PB不存在条件概率的关系,PA PB PC之间应该就都没有条件概率的关系了呀 :) 不知道能不能不吝赐教呀 Mit freundlichen Grüßen Wu,Peng

郭飞 [email protected] 于2020年1月17日周五 上午3:39写道:

1-(0.3+0.3)

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bill831231 avatar Jan 17 '20 09:01 bill831231

两个事件不是独立的,而是互斥的 是否独立于能否用条件概率无关

guofei9987 avatar Jan 20 '20 01:01 guofei9987

Woo,原来是这样啊 多谢多谢

Mit freundlichen Grüßen Wu,Peng

郭飞 [email protected] 于2020年1月20日周一 上午2:10写道:

两个事件不是独立的,而是互斥的 是否独立于能否用条件概率无关

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bill831231 avatar Jan 20 '20 09:01 bill831231