simple statistics

👨🏻‍🏫 學術台數學

[匿名]

2013-04-01 8:55 pm

IF P(A)=0.4 and P(A n B)=0.3, what are the possible values for p(B)?

更新1:

p(B) >= 0.3 ?

回答 (1)

myisland8132

2013-04-01 9:36 pm

✔ 最佳答案

P(A or B) = P(A) + P(B) - P(A and B)

P(A or B) <= 1

P(A) + P(B) - P(A and B) <=1

0.4 + P(B) - 0.3 <= 1

P(B) <= 0.9

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