摘 要
对于波利亚缶模型（或称波利亚罐子模型），本文运用了数学归纳法、条件概率以及广义二项式定理这几种发方法证明了每次取得黑球的概率都相等。
关键词：波利亚罐子模型；条件概率；条件期望
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ABSTRACT
Polya model for pottery (or Polya Urn Model), this paper, the mathematical induction, conditional probability and the generalized binomial theorem proved these types of fat black ball each time the probability of obtaining all the same.
Keywords: Polya Urn Model; conditional probability; conditional expectation
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