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排列、组合(包括两个计数原理)是高中数学中独立性较强的一部分,也是密切联系实际的一部分,它们是学习概率的基础,又是每年高考必考的内容之一,以排列、组合为背景的应用题或以排列、组合(包括两个计数原理)为基础的概率题是高考的热点题型.现归纳总结高考排列组合题的解法,以期望能对大家有所帮助.一、科学分类,合理分步例1(2009年浙江卷)甲、乙、丙3人站到共有7级的台阶上,若每级台阶最多站2人,同一级台阶上的人不区分站的位置,则不同的站法种数是
Arrangement, combination (including the two counting principle) is a high part of high school mathematics independence, is also closely linked to the actual part, they are the basis for learning probability, but also one of the elements of the annual college entrance examination to be arranged, combined As the background of the application or arrangement, combination (including two counting principle) based on the probability of the college entrance examination is a hot question type .To conclude the entrance examination arranged combination of solutions, in the hope can help everyone. Scientific classification, a reasonable step by step Example 1 (Zhejiang volume in 2009) A, B, C 3 people to a total of seven steps, if each step up to 2 people, the same level people do not distinguish between the station position , Then the number of different station method is