Mammography has 90% sensitivity and 98% specificity for breast carcinova. What is the probability that woman with breast carcinoma remains un diagnosed for 2 consecutive years?: (A) 1\/10, (B) 2\/10, (C) 1\/100, (D) 2\/100
Answer is B. False positive = 1- sensitivity = 1- 0.9 = 0.1 For 2 consecutive years = 2x0.1=0.2