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用概率知识解决实际问题是高考中的必考内容,这一类型的问题几乎都是考查概率、概率分布、数学期望以及方差等知识点。在高考中,这一类型问题往往都是在前三道大题中出现,难度不大,但是在今年贵州省的高考数学卷(全国Ⅱ卷)中,考生在这道题上的得分率很低,这是为什么呢?这主要就是学生对这类型问题往往直接入手,没有具体分析问题,没有看出这一个随机变量实际上是满足二项分布,二项分布是概率分布中一个很重要的一种分布。下面以高考中的几道问题来说明。
Using probabilistic knowledge to solve practical problems is a must-read content in the college entrance examination. This type of problem is almost always a matter of examining the knowledge of probability, probability distribution, mathematical expectation, and variance. In the college entrance examination, this type of problem often appears in the first three topics, it is not difficult, but in this year’s college entrance examination mathematics in Guizhou Province (National II), the candidates on this issue score rate is very Why is this low? This is mainly because students often start directly with this type of problem. There is no specific analysis of the problem, and it is not seen that this random variable actually satisfies the binomial distribution. The binomial distribution is an important part of the probability distribution. A distribution. The following is a description of several issues in the college entrance examination.