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23-01-2024
Health

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By examining the chest X−ray, the probability that TB is detected when a person is actually suffering from it is 0.99. The probability of an healthy person diagnosed to have TB is 0.001. In a certain city, 1 in 1000 people suffers from TB. A person is selected at random and is diagnosed to have TB. What is the probability that he/she actually has TB?

A. 55/221
B. 110/221
C. 111/221
D. 56/221

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