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  CFA一级考试攻略:贝叶斯法则。复习到概率部分,就不得不提大名鼎鼎的贝叶斯法则啦~但是在学习贝叶斯法则前,我们还需要了解一些基础的概念。CFA考试比如说独立和互斥事件,还有全概率的计算。

         cfa
  
  下面欣欣老师就带大家来一一掌握。
  
  CFA一级考试的独立事件和互斥事件
  
  1independent events 独立事件
  
  (1)理解:A和B的发生是互不影响的,A、B发不发生,跟对方都没有关系。
  
  (2)公式:P(B|A)=P(B) P(A|B)=P(A) P(AB)= P(A)P(B)
  
  2mutually exclusive events 互斥事件
  
  (1)理解:A和B不能同时发生,互斥一定不独立。
  
  (2)公式:P(AB)=P(A|B) =P(B|A)=0 P(A or B)=P(A)+P(B)
  
  Total probability rule
  
  CFA全概率计算
  
  1公式
  
  For unconditional probability of event A,P(A)=P(A|S1 )P(S1 )+P(A|S2 )P(S2 )+……+P(A|S

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