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UPSC 1997: A survey was conducted on a sample of 1000 persons with reference to their knowledge of English, French and German. The results of the survey are presented in the given Venn diagram. The ratio of the number of persons who do not know any of the three languages to those who know all the three languages is
(a)1/27
(b)1/25
(c)7/550
(d)175/1000
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Not attemptedCorrect Answer: (b) 1/25
From the diagram (given in the paper) the numbers are: only one language = 550, any two = 268, all three = 175. Persons knowing at least one language = 993, so those knowing none = 7. Required ratio = 7 : 175 = 1⁄25 ⇒ option (b). ([edukemy.com](https://edukemy.com/blog/upsc-prelims-topic-wise-questions-basic-numeracy-elementary-algebra-sets-and-functions/?utm_source=openai))
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Frequently Asked Questions
What is the correct answer to this UPSC 1997 Science & Technology question?▼
The correct answer is option (b): 1/25. Watch the detailed video explanation in our Sherlocking Prelims course on UnlockIAS.
Which year was this Quantitative Aptitude question asked in UPSC Prelims?▼
This question was asked in UPSC CSE Prelims 1997, GS Paper 1, as Question 148. It falls under Science & Technology > Quantitative Aptitude.
What is the difficulty level of this UPSC question?▼
This question is rated "moderate". It requires sound conceptual understanding of the topic.
How many UPSC Prelims questions have been asked from Quantitative Aptitude?▼
UPSC has asked 178 questions from Quantitative Aptitude (under Science & Technology) across multiple years. Visit the topic page to see the full list and year-wise trends.