明确概率问题中的等可能假设是我们研究古典概型和几何概型的基础与关键,当等可能的角度不同时,其相应随机事件发生的概率通常是不相等的,不能判断问题中的等可能假设会使我们的解题失去方向,误判问题中的等可能假设则会得出错误的结果. The possible assumptions in explicit probability problems are the basis and key to our study of classical probability models and geometric models. When the possible angles are different, the probability of their corresponding random events is usually not equal, and it cannot be judged in the problem. It may be assumed that we will lose direction in our problem solving and mistaking the possible hypotheses in the problem will lead to wrong results.