(2012)若事件A、B互不相容,且P(A)=p,P(B)=q,則等于:()
A.1-p B.1-q C.1-(p+q) D.1+p+q
A.0.9 B.0.8 C.0.7 D.0.6
A.λ>0 B.λ>-1 C.λ>1 D.以上選項(xiàng)均不成立