estion 20 Assume that we have two events, A and B, that are independent ot yet swered events. Assume further that we know P(A) =0.50 and P(B) =0.40. Find P(A|B) arked out of Select one: Flag question O a. 0.30 O b. 1 O c. 0.50 O d. 0.6 ion 19 The probability that a subject has the absence of disease given that et the subject has a negative screening test result: ered ed out of Select one: O a. The sensitivity of a test g question O b. The predictive value positive of a screening test O c. The predictive value negative of a screening test O d. The specificity of a test