UPSC 1997: In a group of persons travelling in a bus, 6 persons can speak Tamil, 15 can speak Hindi and 6 can speak Gujarati. In that group none can speak any other language. If 2 persons in the group can speak two languages and one person can speak all the three languages, then how many persons are there in the group?

The correct answer is option (c): 23. Watch the detailed video explanation in our Sherlocking Prelims course on UnlockIAS.

This question was asked in UPSC CSE Prelims 1997, GS Paper 1, as Question 145. It falls under Science & Technology > Logical Reasoning & Puzzles.

This question is rated "moderate". It requires sound conceptual understanding of the topic.

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