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CAT 1991 — QA Question 26

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Passage / Data

Answer the following questions based on the information given below:

There were a hundred schools in a town. Of these, the number of schools having a play – ground was 30, and these schools had neither a library nor a laboratory. The number of schools having a laboratory alone was twice the number of those having a library only. The number of schools having a laboratory as  well as a library was one fourth the number of those having a laboratory alone. The number of schools  having either a laboratory or a library or both was 35.

What was the ratio of schools having laboratory to those having library?

Answer & solution

Correct answer: 5 : 3

  • A

    1 : 2

  • 5 : 3

  • C

    2 : 1

  • D

    2 : 3

Solution

Number of schools having library = 15. And number of schools having laboratory = 25.

Hence the ratio = 25 : 15 = 5 : 3.

Hence, option (b).

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CAT 1991 QA Q26: What was the ratio of schools having laboratory to those having library? — Solution | TheCATExam