Q. 9: Suppose vial C tests positive and vials A, E and H test negative. Which patient has the disease?
Q. 10: Suppose vial A tests positive and vials D and G test negative. Which of the following vials should we test next to identify the patient with the disease?
Q. 11: Which of the following combinations of test results is NOT possible?
a. Vial B positive, vials C, F and H negative
b. Vials A and G positive, vials D and E negative
c. Vials B and D positive, vials F and H negative
d. Vials A and E positive, vials C and D negative
Q. 12: Suppose one of the lab assistants accidentally mixed two patients’ blood samples before they were distributed to the vials. Which of the following correctly represents the set of all possible numbers of positive test results out of the eight vials?