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产品检验问题是大家非常熟悉的,新课标中介绍的二项分布、几何分布、帕斯卡分布和超几何分布等几个常见的离散型概率分布均可从产品检验问题中抽象出来.产品检验问题是向学生介绍这些概率分布的好素材.例1一批产品共有N件,其中次品M件.现有放回地从中逐一抽取,求(1)在n次抽取中
The product inspection problem is very familiar to everyone. Some common discrete probability distributions such as binomial distribution, geometric distribution, Pascal distribution and hypergeometric distribution introduced in the new curriculum standard can be abstracted from product inspection problems. It is a good material for introducing these probability distributions to students. Example 1 There are N pieces of a batch of products, among which there are M pieces of defective products. The existing return sites are extracted one by one, seeking (1) in n times of extraction.