概率是九年级学生学习的内容,学生初次接触到的只是书本上简单的概率问题,比如从掷骰子,掷硬币,转转盘等这种简单的游戏中求概率。要想让学生能适应以后日益发展的信息社会,比如生活中的存款、如何计算利息、利润?怎样投资?怎样去投保险?怎样去计算彩票中奖率等。这些都值得我们去研究。下面我就我们现实生活中常见的一些概率问题进行一些简单的分析。一、抓阄谁先谁后的问题生活中,人们有时要用抓阄的方法来决定一件事情,例如我校举行运动会,各班派出1名代表参加,赛前由各班从3个报名中用抓阄方法决定参赛的 Probability is the content of the ninth grader’s study. For the first time, students only come into contact with simple probability problems in books, such as finding the probability from such simple games as rolling the dice, tossing the coin and turning the turntable. To make students adapt to the growing information society in the future, such as deposits in life, how to calculate interest, profits? How to invest? How to insurance? How to calculate the lottery winning rate. These are worth our study. Now I will conduct some simple analyzes of some of the probabilistic problems that are common in our real life. First, grasping the question of who should be the problem After life, people sometimes want to use catchy method to decide one thing, for example, my school sports games, each class sent a representative to participate in the class before the game from the three registration Grasp the method of decision to participate