A test for diabetes results in a positive test in 95% of the

来源：学生作业帮编辑：作业帮分类：数学作业时间：2024/08/31 06:36:01

A test for diabetes results in a positive test in 95% of the cases where the disease is present and a negative test in 97% of the cases where the disease is absent.If 10% of the population has diabetes,what is the probability that a randomly selected person has diabetes,given that his test is positive?
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全体人口中患病且呈阳性者占10%×95%=19/200
故随机抽取的一人患病且呈阳性的概率是19/200

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