Question

P(A)=P(B)=P(C)=1/4 ,P(BC)=0,P(AC)=P(AB)=1/16求事件ABC全不发生的概率

P(A)=P(B)=P(C)=1/4 ,P(BC)=0,P(AC)=P(AB)=1/16求事件ABC全不发生的概率

Answer 1

概率为1-（3/8）=5/8

Answer 2

∵P(AC)=0
∴P(ABC)=0
P(A'B'C')
=P(AUBUC)'
=1-P(AUBUC)
=1-P(A)-P(B)-P(C)+P(AB)+P(BC)+P(AC)-P(ABC)
=1-1/4-1/4-1/4+1/16+1/16+0-0
=3/8