CAT Question Paper | CAT Verbal Ability Slot
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10 months ago
Question :
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?
Option B
is the correct answer.
Explanatory Answer
We see patients 9 to 16 have the vial A, among them patient 9 & 11 have vial D, 10 & 12 have vial D & G hence they cannot be disease positive. Patient 14 & 16 have vial G hence they also can’t test positive. Patient 13 – A, C, F, H and Patient 15 – A, C, E, H
Since A, C, H is common we must test either E or F to confirm the disease.
