为方便计.把甲 乙 丙换成字母A,B,C
已知:
P(A)= 0.4
P(B)= 0.26
P(C)= 0.24
P(AB)=0.08,
P(AC)=0.05
P(BC)=0.04
P(ABC)=0.02
P(A并B并C) = P(A)+P(B)+P(C)-P(AB)-P(AC)-P(BC)+P(ABC)
= 0.4 + 0.26 + 0.24 - 0.08 - 0.05 - 0.04 + 0.02
= 0.75
该人至少读一种报纸的概率是75%
为方便计.把甲 乙 丙换成字母A,B,C
已知:
P(A)= 0.4
P(B)= 0.26
P(C)= 0.24
P(AB)=0.08,
P(AC)=0.05
P(BC)=0.04
P(ABC)=0.02
P(A并B并C) = P(A)+P(B)+P(C)-P(AB)-P(AC)-P(BC)+P(ABC)
= 0.4 + 0.26 + 0.24 - 0.08 - 0.05 - 0.04 + 0.02
= 0.75
该人至少读一种报纸的概率是75%