4th grade math problem

来源: juja 于 2010-02-28 19:03:42 [] [旧帖] [给我悄悄话] 阅读数 : (373 bytes)

Here is a 4th grade math problem. I did not know the answer. who will be the smartest one here?

Colin, Kai, and Sampson are playing a dice game. Colin goes first, Kai second, and Sampson third. The first person to roll a three wins and game is oever. The dice are continuously passed in the above order until some one wins. What is the probability that Sampson wins?

所有跟帖： 

• 回复：4th grade math problem -华伦久费- ♂ 给 华伦久费 发送悄悄话 华伦久费 的博客首页 (418 bytes) () 02/28/2010 postreply 20:33:20

• 25/91 -jjmmjj- ♂ 给 jjmmjj 发送悄悄话 (56 bytes) () 02/28/2010 postreply 22:22:54

• 对头！ -倪达业- ♂ 给 倪达业 发送悄悄话 (279 bytes) () 03/01/2010 postreply 11:27:22

• 对不起，不懂。这个结果应该是每轮有人赢得机会是91/216 -Mr.Coffee- ♂ 给 Mr.Coffee 发送悄悄话 (77 bytes) () 03/02/2010 postreply 12:13:08

• 同意此答案 -没落贵族- ♂ 给 没落贵族 发送悄悄话 (0 bytes) () 03/02/2010 postreply 15:00:38

• 回复：4th grade math problem -StudentDing- ♂ 给 StudentDing 发送悄悄话 StudentDing 的博客首页 (18 bytes) () 03/01/2010 postreply 09:39:15

• 1/3, Everyone has the same chance -Mr.Coffee- ♂ 给 Mr.Coffee 发送悄悄话 (0 bytes) () 03/02/2010 postreply 11:16:37

• sorry, it should be 155/1296 -Mr.Coffee- ♂ 给 Mr.Coffee 发送悄悄话 (209 bytes) () 03/02/2010 postreply 11:31:11

• I am wrong again, it is hard to believe this is a 4th grade math -Mr.Coffee- ♂ 给 Mr.Coffee 发送悄悄话 (0 bytes) () 03/02/2010 postreply 11:43:20

• 同学们，这是笑坛，要不把帖子转到子女教育那边去？ -没落贵族- ♂ 给 没落贵族 发送悄悄话 (0 bytes) () 03/02/2010 postreply 14:55:40

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