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近几年中考对概率的考查主要体现在对概率概念的理解,会求简单随机事件发生的概率,理解大量重复事件中频率与概率间的关系.其总体特征是:主要通过实际问题背景或模拟实验方法,着重于实际问题的解决能力,对事件进行客观评价,为决策提供科学依据,题型虽多样,但难度不大.而求解概率问题的关键是找出一种能恰当分出各种“等可能结果”的规则,列表法或树状图法是常用且有
In recent years, senior high school entrance examination on the probability of the test is mainly reflected in the concept of probability to understand the probability of simple random events will be to understand the large number of repetitive events in the frequency and probability of the relationship between its overall characteristics are: mainly through the actual background or simulation Experimental methods, focusing on the practical problems of the ability to solve the objective evaluation of the incident for the decision-making to provide a scientific basis, although the types of questions is not difficult, but the key to solving the probability problem is to find a can be properly classified “Likely result ” rule, list method or dendrogram are common and have