尾牙的抽獎活動 - 推理遊戲
By Caitlin
at 2010-03-10T04:32
at 2010-03-10T04:32
Table of Contents
大家好, 我又來出題了^^
在公司尾牙的時候一定會有抽獎活動,
獎項都是1000元的紅包. 由每個人排隊上來抽, 每人限抽一張.
假設員工有N個人, 籤筒中有籤N張, 有3*N/4張是銘謝惠顧(假設N是4的倍數).
董事長說: "今晚中獎的機率是25%."
但是頭4位員工連續抽了4張籤都沒中獎, 此時員工抱怨聲四起...
董事長為了平息眾怒, 就承諾大家:
"若連續3次都沒抽中, 第4次不論有沒有中獎都算中獎!"
請問 : 中獎機率從25%增加為多少?
補充: 那四個員工有重抽, 而且抽完都有放回籤筒.
--
在公司尾牙的時候一定會有抽獎活動,
獎項都是1000元的紅包. 由每個人排隊上來抽, 每人限抽一張.
假設員工有N個人, 籤筒中有籤N張, 有3*N/4張是銘謝惠顧(假設N是4的倍數).
董事長說: "今晚中獎的機率是25%."
但是頭4位員工連續抽了4張籤都沒中獎, 此時員工抱怨聲四起...
董事長為了平息眾怒, 就承諾大家:
"若連續3次都沒抽中, 第4次不論有沒有中獎都算中獎!"
請問 : 中獎機率從25%增加為多少?
補充: 那四個員工有重抽, 而且抽完都有放回籤筒.
--
Tags:
推理遊戲
All Comments
By Quanna
at 2010-03-12T01:30
at 2010-03-12T01:30
By Hardy
at 2010-03-14T19:07
at 2010-03-14T19:07
By Queena
at 2010-03-19T07:38
at 2010-03-19T07:38
By Belly
at 2010-03-20T08:44
at 2010-03-20T08:44
By Madame
at 2010-03-23T22:07
at 2010-03-23T22:07
By Olga
at 2010-03-27T15:43
at 2010-03-27T15:43
By Charlotte
at 2010-04-01T07:36
at 2010-04-01T07:36
By Isabella
at 2010-04-01T09:29
at 2010-04-01T09:29
By Emily
at 2010-04-02T05:15
at 2010-04-02T05:15
By Hamiltion
at 2010-04-04T14:02
at 2010-04-04T14:02
By Caitlin
at 2010-04-04T23:41
at 2010-04-04T23:41
By Selena
at 2010-04-06T09:15
at 2010-04-06T09:15
By Gilbert
at 2010-04-11T00:25
at 2010-04-11T00:25
By Ophelia
at 2010-04-14T01:51
at 2010-04-14T01:51
Related Posts
打八折
By Elma
at 2010-03-10T00:41
at 2010-03-10T00:41
打八折
By Poppy
at 2010-03-09T11:32
at 2010-03-09T11:32
打八折
By Elma
at 2010-03-08T22:17
at 2010-03-08T22:17
打八折
By Margaret
at 2010-03-08T17:09
at 2010-03-08T17:09
誰說謊?
By Madame
at 2010-02-28T13:22
at 2010-02-28T13:22