“概率与统计”是新课程的四大内容之一.在各地中考试卷中,关于概率的考题设计新颖、紧贴生活,深受学生喜欢.但有些考题让学生颇感为难.现以2005年中考试题为例,谈谈“一次、二次、三次或三次以上操作”概率问题的解法,在本文中称之为“三维解法”.一、一维直线法当题目条件是 “Probability and Statistics” is one of the four major contents of the new curriculum. In the local examination papers, the questions on probability are novel in design and close to life, and are deeply loved by students. However, some questions make students feel embarrassed. Now 2005. As an example, the solution to the probability problem of “one, two, three or more operations” is called “three-dimensional solution” in this paper. One, one-dimensional straight line method