Through a probability problem, a connection is showed between binomial distribution and negative binomial distribution and therefore a composed formula is set up, which is proved by way of probability and algebra.

 
  • 摘要通过一个概率问题,给出二项分布与负二项分布的一种联系,从而建立一个组合公式,并由概率思维方式与代数方式给出证明。
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