回复：经典好题 - 比三扇门和羊有趣-大家来讨论吧！

来源: jinjing 于 2010-06-19 08:19:43 [] [旧帖] [给我悄悄话] 阅读数 : (290 bytes)

007 is too trick.What is expected value? If we get a box,there are two envelopes,one is x ,other is 10x,If we get x ,we change we earn 9x,if we get 10x we change,we lost 9x.So,changing expected value for earning is 0.This is not paradox,it is trick sentence but interesting.007 is funny.

所有跟帖： 

• 其实你说的这是简单的回答， 不是关键（欢迎排砖） -guest007- ♀ 给 guest007 发送悄悄话 (599 bytes) () 06/19/2010 postreply 17:21:42

• You want to remind me oo/oo=oo? -jinjing- ♀ 给 jinjing 发送悄悄话 (483 bytes) () 06/19/2010 postreply 18:10:22

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