三维随机变量在长方体内取值概率公式的一种证明

A new proving of the probability formula of the three dimensions random variable in the rectangular

本文给出了二维随机变量在长方形内取值概率公式的一种新的证明方法,比已有证明直观、易懂,并用这种方法给出了三维随机变量在长方体内取值概率公式的证明.

In the paper, we give a new method for proving the probability formula of the two dimensions random variable in the rectangular, which is more intuitive and easier to understand. We also give the proof of 3D random variable in the cuboid by using this method.