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概率是高考必考内容,高考试题中无论是以古典概型为背景的分布列,还是以独立重复试验为背景的分布列,都要求计算概率。解答此类问题的前提是正确地理解题意,在审题方面需特别注意。高考在本考点的命题中,体现了文、理科内容上的不同和要求上的不同。文科试卷集中在古典概型、互斥事件的概率,理科考查的重点集中在离散型随机变量的分布列、期望和方差上。试题难度以容易题和中档题为主,考查概率问题的通法:一是理清其中的数据关系,二是利用所学的相关知识合理处理数据并解答。数据关系较复杂时,常需借助表格进行分析、梳理。考点一古典概型与几何概型例1(1)盒子中装有形状、大小完全相同的3
Probability is the college entrance examination content, college entrance examination questions both in the classical profile as the background of the distribution of columns, or to independent repeated trials as the background of the distribution of columns, are required to calculate the probability. The premise for answering such questions is to correctly understand the questions and to pay special attention to the questions. College entrance exam in the proposition, reflects the text, the content of the different science and requirements of different. The concentration of liberal arts papers in classical probability and the probability of mutually exclusive events focuses on the distribution, expectation and variance of discrete random variables. The difficulty of the test questions is easy questions and mid-range questions, examining the probabilistic problem of the general method: First, to clarify the relationship between the data, the second is to use the relevant knowledge of the reasonable treatment of data and answer. When the data relationship is complicated, it is often necessary to analyze and sort through the tables. A typical classical testament and geometry Proof Example 1 (1) box with the shape and size of the same 3