xd_xumaomao

摘要： 条件概率：\[P\left( {B|A} \right) = \frac{{P(A,B)}}{{P(A)}}\] 乘法定理：\[\begin{array}{l}P\left( {A,B} \right) = P\left( {B|A} \right)P\left( A \right)\\P\left 阅读全文