在古典概型中,事件A发生的概率为P(A)=有利的基本事件数/基本事件总数,这个计算式是简单的,但在实际求解古典概型的问题时,有利事件数和基本事件总数却常常不易求得的,往往需要采取一些特殊的处理,才能使问题迎刃而解。所谓轨线问题就是其中的一个,下面以“售票问题”为例,介绍这一类问题 In the classical model, the probability of occurrence of event A is P(A) = the number of favorable basic events / the total number of basic events. This formula is simple, but when the problem of the classical model is actually solved, the number of favorable events and the basic The total number of incidents is often not easy to obtain, and often requires some special treatment in order to solve the problem. The so-called trajectory problem is one of them. The following uses the “ticketing problem” as an example to introduce such issues.