A1
A2
A3
A1A2A3
P(Ac)=1−P(A)
P(A∪B) = P(A) + P(B)−P(A∩B).
P(A∪B∪C) = P(A) + P(B) + P(C)−P(A∩B)−P(A∩C)−P(B∩C) + P(A∩B∩C).
P(A∩Bc) = P(A)−P(A∩B)
(An)n≥1
P
[
n≥1
An
= lim
n→+∞
P(An),
P
\
n≥1
An
= lim
n→+∞
P(An),
1
/
2
100%
