2. Three axioms of probability theory

Axiom 1:
0<=P(E)<=1

Axiom 2:
P(S)=1

Axiom 3:
For any series of mutually incompatible events E1, E2,... (that is, if i!=j, then EiEj=NULL):
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Origin blog.csdn.net/yanghangwww/article/details/104046485