[[File:Pascal's triangle; binomial distribution.svg.png|thumb|280px|Binomial distribution for <math>p=0.5</math><br />with ''n'' and ''k'' as in [[Pascal's triangle]]<br /><br />与n和k相关的二项分布。一个8层(''n'' = 8)的高尔顿盒子中的一个球最终进入中央箱子(''k'' = 4)的概率是 <math>70/256</math>.|链接=Special:FilePath/Pascal's_triangle;_binomial_distribution.svg.png]]