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概率内容的新概念较多 ,相近概念容易混淆 ,本文就学生易犯错误作如下总结 :类型一 “非等可能”与“等可能”混同例 1 掷两枚骰子 ,求所得的点数之和为 6的概率 .错解 掷两枚骰子出现的点数之和 2 ,3,4 ,… ,12共 11种基本事件 ,所以概率为P =111.剖析 以上 11种基本事件
There are many new concepts of probabilistic content and similar concepts are confusing. This article summarizes the students’ susceptibility to errors: Type 1 “non-equivalence possible” and “possible possible” mixed with the same example 1 throw two dices, the sum of the points obtained is The probability of 6. Mistakes The sum of the number of points where two dices are thrown 2 ,3,4 ,... ,12 There are a total of 11 basic events, so the probability is P = 111. The above 11 basic events are analyzed.