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,...

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