概率统计知识应用广泛,是高考考查学生应用意识和应用能力经久不衰的热点.不少的概率统计问题涉及到分类讨论,认真审题,弄清背景,确定标准,恰当分类,不重不漏,问题即可迎刃而解.一、计数问题中的分类讨论例1.将5名实习教师分配到高一年级的3个班实习,每 Probability and statistics knowledge is widely used, is the college entrance examination test student application awareness and application of enduring hot spots.Many of the probability and statistics issues related to the classification discussion, serious examination, find out the background, determine the standard, the appropriate classification, not omission, Problems can be easily solved First, the classification of questions in the discussion Example 1. The 5 internship teachers assigned to the first grade of the three classes intern, each