19世纪法国著名数学家拉普拉斯说:“对于生活中的大部分,最重要的问题实际上只是概率问题.”近几年来,全国各地的中考试题都加强了对概率的考查,涉及现代生活的各个方面,解题方法主要是运用树状图、枚举法或者列表法,从联系生活情境的角度讲,主要包括以下几种类型. Laplace, a famous French mathematician in the 19th century, said: “For the most part of life, the most important issue is actually a question of probability.” In recent years, mid-level test questions across the country have strengthened the examination of probabilities. In relation to all aspects of modern life, the method of solving problems is mainly to use tree diagrams, enumeration methods, or list methods. From the perspective of linking life situations, it mainly includes the following types.