Question

概率论与数理已知P(A)=1/2,P(B)1/3,P(C)=1/5P(AB)=1/10,P(AC)=1/15,P(BC)

Answer 1

P(AUBUC)

= P(A) + P(B) + P(C) - P(AB) - P(BC) - P(AC) + P(ABC)

= 1/2 + 1/3 + 1/5 - 1/10 - 1/20 - 1/15 + 1/30

= 0.85