# CAT 2020 Question Paper | CAT LR DI Slot 1

###### CAT Previous Year Paper | CAT DILR Questions | Question 23

The CAT Exam is known to give out some questions where in you yourself are intially perplexed with the solution or the numbers that you've got - you might also want to double check - and to our surprise, the calculated numbers might seem to be correct. This is a DILR question from CAT Previous Year Paper where the numbers seem to present an anomaly. Don't shy away from such questions, but do double check to verify the numbers you have got is right. Now solve this amazing question by yourself and be prepared to be stunned to look for the same number in the answer explanation as well!

## CAT DILR : CAT 2020 Question Paper Slot 1

1000 patients currently suffering from a disease were selected to study the effectiveness of treatment of four types of medicines — A, B, C and D. These patients were first randomly assigned into two groups of equal size, called treatment group and control group. The patients in the control group were not treated with any of these medicines; instead they were given a dummy medicine, called placebo, containing only sugar and starch. The following information is known about the patients in the treatment group.

a. A total of 250 patients were treated with type A medicine and a total of 210 patients were treated with type C medicine.

b. 25 patients were treated with type A medicine only. 20 patients were treated with type C medicine only. 10 patients were treated with type D medicine only.

c. 35 patients were treated with type A and type D medicines only. 20 patients were treated with type A and type B medicines only. 30 patients were treated with type A and type C medicines only. 20 patients were treated with type C and type D medicines only.

d. 100 patients were treated with exactly three types of medicines.

e. 40 patients were treated with medicines of types A, B and C, but not with medicines of type D. 20 patients were treated with medicines of types A, C and D, but not with medicines of type B.

f. 50 patients were given all the four types of medicines. 75 patients were treated with exactly one type of medicine.

Question 23 : How many patients were treated with medicine types B and D only?

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The question is "How many patients were treated with medicine types B and D only? "

##### Hence, the answer is '150'

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