回复：Wrong:P(a^bd^cd)=.336

来源: Jinjing 于 2010-01-30 07:51:42 [档案] [旧帖] [给我悄悄话] 阅读数 : (141 bytes)

回答: Reply to Jinjing on question 3 由 endofsuburbia 于 2010-01-29 21:19:35

P(a^bd^cd)=.35*.3+(.3*.5+.7*.5)*(.3/(1-.35))=.336 wrong.
It should be:P(a^bd^cd)=.35*.3+.3*(.15/(1-.35))+.5(.3/(1-.35))=.405

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• 回复You're right,I'm going down. -Jinjing- ♀ (85 bytes) () 01/30/2010 postreply 09:54:42

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