排列、组合和二项式定理是概率的基础.高中数学的概率与统计是对初中数学里统计的初步深入和扩展,是新增的内容.这两块内容均与实际生活、生产问题紧密相关,是高考数学的必考内容.为了更好地掌握概率统计和组合这一块内容,我们有必要对它的重难点进行有效突破. The arrangement, combination, and binomial theorem are the basis of probability. The probability and statistics of high school mathematics are the preliminary depth and expansion of statistics in junior high school mathematics, and are new content. Both of these contents are closely related to real life and production issues. It is a must-examination content for college entrance examination mathematics. In order to better grasp the content of probability, statistics and composition, we need to make effective breakthroughs in its difficult and difficult points.