NCERT Exercise 13.3 Q5 - Probability
Question: A laboratory blood test is 99% effective in detecting a certain disease when it is present. It also yields a false positive for 0.5% of healthy persons. If 0.1% of the population has the disease, find the probability that a person has the disease given that the test is positive.
Answer: 22/133.
Full step-by-step NCERT solution with diagrams on Something by Zero.