<p>已知随机变量（X，Y）的分布律 <img max-width="300" src="https://learnfile.20230611.cn/learnAppQuestion/87/c9/87c94f5811670a4376a8db292da84942.jpg" style="width: 100%;height: auto;"><img max-width="300" src="https://learnfile.20230611.cn/learnAppQuestion/ba/c9/b - 概率论与数理统计（经管类）(04183)