## Do I have the disease?

Let’s say there is a disease that affects, on average, 2% of people. There is a test for this disease.

- If someone who
*has the disease*takes the test, the test will be positive 95% of the time. - If someone who
*does not have the disease*takes the test, the test will be positive 10% of the time.

You just took the test and it was positive. What’s the chance you have the disease?

Solution