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A teacher tests negative for COVID-19. It is estimated that 4% of the general Ontario population has COVID-19. For someone with COVID-10, the test correctly
A teacher tests negative for COVID-19. It is estimated that 4% of the general Ontario population has COVID-19. For someone with COVID-10, the test correctly shows a true positive result 81% of the time. For someone who does not have COVID-19, the test correctly shows a true negative result 95% of the time. Calculate the probability that the teacher has COVID-19, given that he had a negative test result.
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