https://blog.gongquiz.com/2022/12/01/%ec%9d%b4%ed%95%ad%eb%b6%84%ed%8f%acbinomial-distribution%ec%97%90%ec%84%9c-%eb%a7%a4%ed%9a%8c-a%ea%b0%80-%ec%9d%bc%ec%96%b4%eb%82%98%eb%8a%94-%ed%99%95%eb%a5%a0%ec%9d%b4-%ec%9d%bc%ec%a0%95%ed%95%9c/