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离散型随机变量分布列是高中数学的重要内容,分布列的计算是必修3的概率计算的延伸,概率讨论的是某一具体事件概率的计算,分布列讨论的是全部基本事件概率的计算,解决随机变量的分布列的关键是理解基本概念和进行概率计算.下面举例说明随机变量分布列在解题中的应用.一、利用随机变量的分布列求参数例1设随机变量ξ的分布列为P(ξ)=
The distribution of discrete random variables is an important part of high school mathematics. The calculation of distribution columns is an extension of the required probability calculations. Probability discusses the calculation of the probability of a specific event. The distribution column discusses the calculation of the probability of all basic events. The key to solving the distribution of random variables is to understand the basic concepts and perform probability calculations. The following is an example of the application of random variable distribution listed in the problem solving. First, use the distribution of random variables to find parameters Example 1 Set the distribution of random variables ξ For P(ξ)=