CAT 2020 Question Paper | CAT LR DI Slot 3

CAT Questions

Are you looking for a good DILR set to prepare for the CAT Exam? The actual CAT previous year paper questions are the best indicator of what the CAT Question Paper might have for you. The DILR set below is a set that appeared in slot 3 of CAT 2020 Question Paper and it is among the easier sets that appeared in this slot.
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CAT DILR : CAT 2020 Question Paper Slot 3

Sixteen patients in a hospital must undergo a blood test for a disease. It is known that exactly one of them has the disease. The hospital has only eight testing kits and has decided to pool blood samples of patients into eight vials for the tests. The patients are numbered 1 through 16, and the vials are labelled A, B, C, D, E, F, G, and H. The following table shows the vials into which each patient’s blood sample is distributed.
 
If a patient has the disease, then each vial containing his/her blood sample will test positive. If a vial tests positive, one of the patients whose blood samples were mixed in the vial has the disease. If a vial tests negative, then none of the patients whose blood samples were mixed in the vial has the disease.

Question 22 : 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?

1. Vial H
2. Vial E
3. Vial B
4. Vial C

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Video Explanation

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Explanatory Answer

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The question is " 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? "

Hence, the answer is 'Vial E'

Choice B is the correct answer.