论文部分内容阅读
学习概率论的过程中,完成一定数量的习题是必不可少的。尤其对于初学者来说,认真地求解教科书上每道习题,包括若干较难的问题,这对于理解、掌握概率论的一些基本概念,培养解题能力将是非常有益的。在概率论的习题中最基本的问题是计算事件的概率和随机变量的数学期望,不少这一类的问题求解方法多样,有的技巧性也较强,但无论对于怎样的问题,解题时首先必须看清题意,注意所设事件的真正含义,否则将会得出错误的结论,本文将举一例以说明,此外,本文将通过若干例子给出计算概率及期望的几种不同方法。
In the process of learning probability theory, it is indispensable to complete a certain number of exercises. Especially for beginners, seriously solving every problem in textbooks, including some difficult problems, will be very helpful for understanding and mastering some basic concepts of probability theory and developing problem-solving abilities. The most basic problems in the probabilistic exercise are the calculation of the probability of the event and the mathematical expectation of the random variable. Many of these types of problems have various methods for solving problems, and some techniques are also strong, but no matter what the problem, the problem is solved. The first thing to do is to look at the meaning of the question and pay attention to the true meaning of the set event. Otherwise, it will lead to an erroneous conclusion. This article will give an example to illustrate. In addition, this article will give several different methods for calculating probability and expectation through several examples. .