三、判断以下等式是否成立1) A∪B=AB∪B; ( )2) overline(A∪BC)=overline(B∪C); ( )3) 若overline(A)subsetoverline(B),则overline(B)subsetoverline(A); ( )4) overline(ABC)=overline(A)overline(B)overline(C); ( )5) overline(A∪B∪C)=overline(A∪B∪C); ( )6) overline(ABC)=overline(A∪B∪C); ( )7) bigcup_(i=1)^nA_(i)=bigcap_(i=1)^noverline(A_{i)}; ( )

3.指出下列等式和命题是否成立,并说明理由:-|||-(1) cup B=(AB)cup B;-|||-(2) overline (A)B=Acup B:-||

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

(1)(overline(AB)cup C)(overline(AC)); (2)(Acup B)(Acupoverline(B)).6.证明:(Acup B

若Asupset B，则以下关系式AB=B，Acup B=A，overline(A)subsetoverline(B)中A. 全对B. 1个对C. 全错D. 2

1.已知 P(A)=1/2 , P(B)=1/3 , (AB)=1/10, 则 (overline (A)cap overline (B))= __

1.已知事件A,B,C,则以下结论错误的是 () .-|||-(a) overline (AB)=overline (A)cup overline (B) (b

5、判断 设A，B是任意两事件，若AB=phi，且overline(A)B=phi，则overline(A)=B.A. √B. ×

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

5.设A,B,C为三个随机事件,且 (overline (A)cup overline (B))=0.8 (overline (A)cup overline (

1.设 (AB)=P(overline (A)overline (B)), 且 (A)=p, 求P(B).