Question

求解：数学概率问题

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?
我需要详细步骤及解答，可以是中文解答，谢谢
我给再多分你不会做又有你神马事

Answer 1

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

Answer 2

给0分还要过程？