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概率是高中教材新增内容,由于其贴近实际、贴近生活,因此,在近几年的高考中,很多省市试题中的实际应用题都是一道有关概率的解答题,分值较高.这部分内容虽然在教材中所占的篇幅不大,但基本概念多,有的概念意义相近容易混淆,而且解题结果不易检验,所以同学们普遍感到学习困难,易犯错误.在解答概率题目中如何减少错误,提高正确率,正确区分以下四对概念很有必要.
Probability is a new addition to high school textbooks. Because it is close to reality and close to life, in the college entrance exams in recent years, practical questions in many provincial and municipal exam questions are all related to probabilistic answers, with a high score. Although some of the content in the textbook is not large, there are many basic concepts. Some concepts are similar in meaning and are easily confused. The result of the problem is not easy to test. Therefore, the students generally feel that learning is difficult and easy to make mistakes. How to reduce errors, increase accuracy, and correctly distinguish the following four pairs of concepts are necessary.