There is a disease that affects 1/1000 people. A blood test for the disease has a false positive rate of 2% and a false negative rate of 1%. If you get the blood test and it comes back positive, what is the probability you are sick?

A First Course in Probability (10th Edition)
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Chapter1: Combinatorial Analysis
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Could you help me please:

There is a disease that affects 1/1000 people. A blood test for the disease has a false positive rate
of 2% and a false negative rate of 1%. If you get the blood test and it comes back positive, what is
the probability you are sick?

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