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1复习回顾师:通过前面我们对概率意义及其性质的学习,已初步掌握了两个事件之间的关系与运算以及概率的基本性质.那么请同学们思考以下几个问题,经小组讨论后作答.(出示问题)(1)简述两事件之间的关系(包含、相等、互斥、对立、并事件、交事件)(2)概率的加法公式是什么?对立事件的概率有什么关系?生:(各小组同学认真思考,积极参与,一小组同学作答后,其余同学相互补充,课堂气氛活跃.)师:同学们回答得很好,下面由小组长展示各组试验成果.
1 Review Reviewer: Through our previous study of probabilistic meaning and its nature, we have initially mastered the relationship between the two events and the basic nature of the probability. Then ask the students to think about the following questions, after discussion in the group. Respondents. (Presentation of questions) (1) Brief description of the relationship between two events (containment, equality, mutual exclusion, opposition, and event, intersection event) (2) What is the addition formula of probability? What is the relationship between the probability of opposing events? Students: (The students in each group think hard and actively participate. After a group of students responds, the other students complement each other and the atmosphere in the classroom is active.) Teacher: The students responded well. The team leader presented the results of the experiments.