UPSC 2007: Groups, each containing 3 boys, are to be formed out of 5 boys – A, B, C, D and E – such that no one group contains both C and D together. What is the maximum number of different groups?

The correct answer is option (c): 7. Watch the detailed video explanation in our Sherlocking Prelims course on UnlockIAS.

This question was asked in UPSC CSE Prelims 2007, GS Paper 1, as Question 140. It falls under Science & Technology > Quantitative Aptitude.

This question is rated "easy". It tests basic recall and most well-prepared aspirants should answer it correctly.

UPSC has asked 164 questions from Quantitative Aptitude (under Science & Technology) across multiple years. Visit the topic page to see the full list and year-wise trends.