(A|B)=dfrac (2)(3) . (B|overline (A))=dfrac (1)(10), 求P(B).

(5)设 (A)=dfrac (1)(3), (B)=dfrac (1)(4), (Acup B)=dfrac (1)(2), 则 (overline (A)c

(B|A)=dfrac (1)(3) . (A|B)=dfrac (1)(2), 求 (Acup B).

随机事件 A,B 满足 (A)=P(B)=dfrac (1)(2), 且 (Acup B)=1, 则 (overline (A)cup overline (B)

[题目]设A,B是两事件,已知 (A)=dfrac (1)(4) (B)=-|||-1/2, (AB)=dfrac (1)(8), 求 (Acup B)(ov

设P（A）=(1)/(3)，P（B）=(1)/(4)，P（A∪B）=(1)/(2)，求P（overline(A)∪overline(B)），P（overline

2.设A,B为两个事件,且 (A)=dfrac (1)(4), (B|A)=dfrac (1)(3), (A|B)=dfrac (1)(2), 求 (Acup

3.设A，B为两事件，已知P(A)=(1)/(3)，P(A|B)=(2)/(3)，P(B|overline(A))=(1)/(10)，求P(B).3.设A，B为

8.已知 (A)=dfrac (1)(4) ,(B|A)=dfrac (1)(3) ,(B)=dfrac (1)(6) ,则-|||-P(A|B)=-|||-A

已知P（A）=0.4，P（B）=0.3，P（B|overline(A)）=0.4．求：（1）P（overline(A)B）；（2）P（overline(A)ov

(B|A)=dfrac (1)(3) .(A|B)=dfrac (1)(2), 则-|||-(Acup B)= __ 。