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UPSC 1999: In a group of five people—K, L and M are ambitious; M, N and R are honest; L, M and N are intelligent and K, N and R are industrious. Among these, neither industrious nor ambitious person(s) would include
(a)K alone
(b)L and R
(c)M and N
(d)None in the group
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Not attemptedCorrect Answer: (d) None in the group
Ambitious set = {K, L, M} and Industrious set = {K, N, R}. Their union covers all five persons {K, L, M, N, R}; hence no one is left who is simultaneously ‘neither industrious nor ambitious’, so the correct choice is “None in the group”. (UPSC answer key lists option D for Q139) ([scribd.com](https://www.scribd.com/document/932458605/Prelims-1999))
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Frequently Asked Questions
What is the correct answer to this UPSC 1999 Science & Technology question?▼
The correct answer is option (d): None in the group. Watch the detailed video explanation in our Sherlocking Prelims course on UnlockIAS.
Which year was this Logical Reasoning & Puzzles question asked in UPSC Prelims?▼
This question was asked in UPSC CSE Prelims 1999, GS Paper 1, as Question 139. It falls under Science & Technology > Logical Reasoning & Puzzles.
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 Logical Reasoning & Puzzles?▼
UPSC has asked 71 questions from Logical Reasoning & Puzzles (under Science & Technology) across multiple years. Visit the topic page to see the full list and year-wise trends.