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1问题描述在学习古典概率模型的计算时,课本上有这样一道例题:题目某种饮料每箱装6听,如果其中有2听不合格,问质检人员从中随机抽出2听,检测出不合格产品的概率有多大?[1]对于此例题,老师与学生均存在两种不同解法的现象,讨论激烈.解法1(有序抽取):同课本解法,简单描述:全部基本事件总数为30,满足条件的基本事件为18个,所以P=18/30=3/5.
1 Problem Description In studying the calculation of the classical probability model, the textbook has such a case: the title of a beverage loaded 6 boxes per case, if two of them failed, ask the quality control officers randomly selected from 2, detected no The probability of qualified products is much? [1] For this example, there are two different solutions to the phenomenon of teachers and students, the discussion is intense. Solution 1 (orderly extraction): the same textbook solution, a brief description: the total number of all basic events 30 , The number of basic events that satisfy the condition is 18, so P = 18/30 = 3/5.