对于初学概率的同学而言,计算随机事件发生的概率往往是很棘手的问题,这主要是计算不得要领所致.现介绍计算概率的几种方法策略,供同学们学习时参考借鉴.一、公式法当一个事件A的可能结果 m比较容易得出时,可以将事件A的所有出现的等可能的结果n列举出来,再求二者的商,即用P(A)=m n来计算该事件A的可能结果 m发生的概率.例1有7张卡片,上面分别写着1、2、3、 For beginners probability students, the probability of calculating the probability of random events is often a very difficult issue, which is mainly due to the calculation of the essentials are introduced to calculate the probability of several strategies for students to learn from the reference for reference. Formula Method When the possible outcome m of an event A is relatively easy to draw, we can enumerate the possible result n of all appearances of the event A, and then obtain the quotient of the two, that is, P (A) = mn Possible outcome of event A The probability of occurrence m Example 1 has 7 cards with 1, 2, 3,