回複：why P(notA*notB)=P(notA)*P(notB)?

P(notA)=P{aBcdef,abCdef,abcDef,abcdEf,abcdef}=.683

P(notB)=P{Abcdee,abCdef,AbcDef,abcdEf,abcdef}=.784

P(notA*notB)=P(abCdef,abcDef,abcdEf,abcdef}=.53.5=.683*.784

So,...

Why mony stars Q ,the anwser is the same,because the star show first, don't care the other stars,so....

所有跟帖： 

• why P(abCdef,abcDef,abcdEf,abcdef}=.535? -wushuihe- ♂ (0 bytes) () 02/06/2011 postreply 12:31:45

• P(abCdef,abcDef,abcdEf,abcdeF,abcdef}=.681^2*.319+.681^3*.319+.. -jinjing- ♀ (219 bytes) () 02/06/2011 postreply 17:43:32

• 回複：P(abCdef,..,f}=.681^2*.319+.681^3*.319+..=.464=.681*.681 -jinjing- ♀ (0 bytes) () 02/06/2011 postreply 17:47:52