等可能事件的概率与排列组合知识密切相关,求等可能事件的概率,关键是求基本事件数n和可能事件数m,这就需要综合利用两个原理及排列、组合知识来解决,因此,也常常利用求排列、组合问 The probability of such possible events is closely related to the arrangement and combination of knowledge. The key to finding the probability of possible events is to find the number of basic events n and the number of possible events m. This requires the comprehensive use of two principles and permutations and combinations of knowledge to solve the problem. It is also often used to find and arrange