概率中一点浓度想法

The idea of density in probability

全概率公式是初等概率论中最基本的公式,但是利用公式计算相对比较麻烦.联系实际生活中的浓度概念,给出了全概率公式的简便计算.

Total probability formula is the most important formula in the classical probability. However, it is difficult to calculate in applying the for- mula. In this paper, the convenient calculation is provided by contracting the actual life.