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中考命题近年来侧重考查概率的基础知识、基本公式和基本模型(摸球模型和几何模型),以及利用图表列举法分析计算某一事件的概率,尤其重视对概率知识的综合应用.因此,在复习教学中要注重培养学生理解应用概率的基础知识并引导学生灵活延展,从而提升概率在生活实践中的应用能力.一、全面巩固概率的基本公式和基础知识以及基本模型的理解掌握,提升学生的基本应用能力例1(2012年杭州)一个不透明的盒子中装有2个红球和1个白球.它们除颜色外都相同,若从中任意摸出一个球,则下列叙述正确的是().
In recent years, the senior high school entrance examination test focused on probing the basic knowledge of probabilities, basic formulas and basic models (touch ball model and geometric model), as well as the use of chart enumeration method to analyze and calculate the probability of an event, with particular emphasis on the comprehensive application of probability knowledge. Review teaching should pay attention to students to understand the basic knowledge of application probability and guide students to be flexible extension, thereby enhancing the probability of life in practical application ability.First, the comprehensive consolidation of probability basic formula and basic knowledge and understanding of the basic model master, enhance students Example 1 (Hangzhou, 2012) An opaque box contains 2 red and 1 white balls. They are the same except for their color. If you can play a ball at will, the following statement is correct () .