your formula are good,but opperation is....

来源: jinjing 于 2010-07-04 15:07:20 [] [旧帖] [给我悄悄话] 阅读数 : (164 bytes)

P(A1A2A5A2A5A3)+P(A1A2A5A2A4A3)+P(A1A2A5A3A4A3)+P(A5A2A5A3A4A3)=
1/16+1/32+1/16+1/16=6/32.
so,19/32 is right.
The best method was shown already by someone.

所有跟帖： 

• 回复：Still not correct, but thanks.... -tony_ren- ♂ 给 tony_ren 发送悄悄话 (117 bytes) () 07/04/2010 postreply 19:19:37

• P(A5A2A5A3A4A3)=1/16 ,it is not 1/8,last term is-1/32 -jinjing- ♀ 给 jinjing 发送悄悄话 (23 bytes) () 07/05/2010 postreply 07:30:05

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