標題:
急問2條數學(M1書數)
發問:
Given that A and B are independent events with P(A) = 0.82, P(B) = 0.62 , find: a) P(A and B / A or B) b) P(A / A or B) 佢個ANS係 0.5457 0.8802 但係求極個答案都錯, 請有心人列式教下我 THANKS 更新: a) P(A∩B │ A ∪B) b) P(A │ A ∪B) 更新 2: 佢係一條來的, 即a要求: the probability of A∩B given A∪B
最佳解答:
Given that A and B are independent eventswith P(A) = 0.82, P(B) = 0.62 , find: a) P(A and B｜ A or B) SolP(A or B)=P(A)+P(B)－P(AB)=0.82+0.62－0.82*0.62=0.9316P(A and B ｜A or B) =P(P(A and B)/P(A or B) =0.82*0.62/0.9316=0.5757277b) P(A｜A or B) SolP(A｜A or B) =P(A)/P(A or B)=0.82/0.9316=0.880206
其他解答:
此文章來自奇摩知識+如有不便請留言告知
a) P(A∩B │ A ∪B) b) P(A │ A ∪B) 2010-09-26 18:46:41 補充： Thanks, 已解決, 原來禁簡單, 想得太複雜了~_~ 2010-09-26 18:47:33 補充： 同埋螞蟻雄兵你第一條式對, 但計錯左個答案, anyway, thx ^^|||||Is it P(A and B) /P( A or B) ? 2010-09-26 18:37:09 補充： okay~~
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