(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Acup B,overline(AB),Acup Bcup C,overline(AB)C,overline(AB)C,Aoverline(B)U C的概率.(3)已知P(A)=1/2,(i)若A,B互不相容,求P(overline(AB)),(ii)若P(AB)=1/8,求P(overline(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$A\cup B,\overline{AB},A\cup B\cup C,\overline{AB}C,\overline{AB}C,A\overline{B}U C$的概率. (3)已知P(A)=1/2,(i)若A,B互不相容,求$P(\overline{AB}),(ii)$若P(AB)=1/8,求$P(\overline{AB})$.

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