2.设A,B是两个事件,已知 P(A)=1/4 (B)=1/2, (AB)=1/8, 求 (Acup B),-|||-P(AB),P(AB ), [ (Acup B)(overline (AB))] .

2.设A,B是两个事件,已知P(A)=0.25,P(B)=0.5, P(AB)=0.125,求(Acup B), P(AB),P(AB),-|||-__ __

[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

求-|||-(1)P(A),P(B ); (2)P(AB);-|||-(3) (Acup B); (4)P(AB);-|||-(5)P(AB),P(BA).

(1)设事件A与B相容,则有 ()-|||-(A) (Acup B)=P(A)+P(B);-|||-(B) (Acup B)=P(A)+P(B)-P(AB);-

(2)已知P(A)=1/2,P(B)=1/3,P(C)=1/5,P(AB)=1/10,P(AC)=1/15,P(BC)=1/20,P(ABC)=1/30,求Ac

(Acup B)P(AB)leqslant P(A)P(B) B (AB)geqslant P(A)P(B)(Acup B)P(AB)leqslant P(A)

4.已知事件A与B相互独立，且P(overline(AB))=(1)/(9)，P(overline(AB))=P(overline(AB))，求P(A)，P(B

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

[题目]已知AC B, P(A)=0.4 , P(B)=0.6 ,求-|||-(1)P(A),P(B);-|||-(2) (Acup B) ;-|||-(3)P

[单选题]设A、B是两个事件,P(A)=1/2,P(B)=1/3,P(AB)=1/4,则P(A∪B)为________。A．5/12B．1C．3/4D．7/12