Re: [問題] 有關機率的問題..
※ 引述《bluesnow4425 (衰弱殘)》之銘言：
: 自修時寫的題目 可是他只有答案我真的不知道我錯在哪ˊˋ
: Two events are complementary when
: A. the sum of their probabilities equal one.
: B. the joint probability of the two events is one.
: C. they are both independent and mutually exclusive.
: D. None of the above
: 請教各位板大
: 為什答案不是A
: 而是D啊?
B,B'為互補 <==> (1) P(B聯集B')=1 collectively exhausive
(2) P(B交集B')=0 mutually exclusive
A只滿足條件(1)
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※ 編輯: protwister 來自: 218.173.2.140 (12/05 09:30)
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