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苏教版新教材必修3中概率一章删掉了旧教材中的独立事件和独立重复试验,教材中还同时删掉了排列组合的知识,增加了几何概型.虽然整体上难度有所降低,但学生在学习概率时往往会在以下几对关系上模糊不清,容易出错,学习时应注意加以辨析.一、“频率”与“概率”频率是指一个随机事件在n次试验后,事件发生的次数与试验次数的比值,它是随着试验次数的变化而变化的,是随机的;并随着
Sujiao version of the new textbook compulsory 3 in Chapter 3 of the probability of deletion of the old teaching materials in the independent events and independent repeated trials, teaching materials also delete the permutation and combination of knowledge, an increase of geometry, although the overall degree of difficulty decreased , But students often learn the probability of confusion in the following pairs of relationships, easy to make mistakes, learning should be noted to be analyzed. “Frequency ” and “probability ” frequency refers to a random event in n After the test, the ratio of the number of occurrences to the number of tests, which varies with the number of tests, is random and follows