A New Serologic Test Has Been Developed for the Detection

A new serologic test has been developed for the detection of active pulmonary tuberculosis and is compared to the gold standard of sputum mycobacterial culture.  A total of 1000 subjects are randomly selected for testing from a population with a high prevalence of tuberculosis.  Results of the study are given below: Which of the following is the positive predictive value of the test under study?

A) 130/180
B) 130/190
C) 180/1000
D) 760/810
E) 760/820

Correct Answer:

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