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
(B|A)=dfrac (1)(3) .(A|B)=dfrac (1)(2), 则-|||-(Acup B)= __ 。
(A|B)=dfrac (2)(3) . (B|overline (A))=dfrac (1)(10), 求P(B).
3.已知 (A)=dfrac (1)(3), (B|A)=dfrac (1)(4) ,(A|B)=dfrac (1)(6), 则 (Acup B)= __
19.设A,B为两个随机事件,且 (A)=dfrac (1)(3), (B|A)=dfrac (1)(4), (A1B)=dfrac (1)(2) 则-|||-
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
(B|A)=dfrac (1)(3) . (A|B)=dfrac (1)(2), 求 (Acup B).
1.已知 为两个随机事件,且 (A)=dfrac (1)(2) , (B)=dfrac (3)(5) , (B|A)=dfrac (4)(5), 求:-|||-
二、化简下列各式-|||-1、 (Acup B)(overline (A)cup B)(Acup overline (B))