A test was considered for diagnosing a disease. Out of 80 positive cases with this test, 40 actually had no disease. Out of 9920 tested negative cases 9840 actually had no disease. Calculate the sensitivity of the test-: (A) 13%, (B) 33%, (C) 50%, (D) 99%
Answer is B. Ref :Parks 23rd edition pg 139 Sensitivity = TP / (TP + FP) = 40 / (40+80)=. 33