Seven people A, B, C, D, E, F and G are sitting in a straight row facing north. Only three people are sitting between C and D. E is sitting to the immediate right of C and F is sitting to the immediate right of E. If there are four people sitting to the right of F, then how many people are sitting to the right of D?

1. A

   4

2. B

   2

3. C

   1

4. D

   3

Appeared in: DSSSB 6 September 2024

Explanation

• The most concrete clue is "four people sitting to the right of F," which definitively places F at position 3 in a 7-person row.
• The statements "F is to the immediate right of E" and "E is to the immediate right of C" create a fixed block of C-E-F. With F at position 3, C must be at 1 and E at 2.
• With C at position 1, the condition "three people are sitting between C and D" places D at position 5 (positions 2, 3, and 4 are in between).
• Since D is at position 5 in a 7-person row, there are two positions (6 and 7) to D's right. Thus, two people are sitting to the right of D.

Why Other Options Were Wrong

• Option A: This is incorrect. Having 4 people to the right of D would place D at position 3. However, F is at position 3.
• Option C: This is incorrect. Having 1 person to the right of D would place D at position 6. This would violate the condition of having three people between C (at position 1) and D.
• Option D: This is incorrect. Having 3 people to the right of D would place D at position 4. This would mean only two people (at positions 2 and 3) are between C and D, contradicting the given condition.

Related Visual

Clinical Relevance

• Nursing practice connection: This is primarily an exam-oriented knowledge point with limited direct bedside application, so retain Logical Reasoning - Linear Seating Arrangement as background academic context rather than a clinical decision trigger.
• This question does not test a clinical concept but assesses logical reasoning and problem-solving skills.
• These skills are essential for nurses in prioritizing tasks, interpreting complex patient information, and making sound clinical judgments under pressure.
• What if? If the condition was 'three people are sitting to the right of F', then F would be at position 4, C at 2, E at 3, and D at 7. In that case, 0 people would be to the right of D.

How to Approach the Question

• First, identify the total number of positions (7) and the direction everyone is facing (North).
• Look for the most definite piece of information to anchor your arrangement. The clue 'four people sitting to the right of F' is an absolute placement, not a relative one, making it the best starting point.
• Place F at position 3 based on this clue. Then, use the relative clues ('immediate right') to place E and C, forming a solid block (C-E-F).
• Use the remaining major clue ('three people between C and D') to place D relative to the now-fixed position of C.
• Once the positions of the key individuals (C, E, F, D) are determined, re-read the question carefully: 'how many people are sitting to the right of D?'.
• Count the number of empty or filled slots to the right of D's position to find the final answer.

Concept Tested & Keywords

• Concept Tested: Logical Reasoning - Linear Seating Arrangement
• Stem keywords: seven people, straight row, facing north, between C and D, immediate right
• Lead-in keywords: how many

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QEWvl4g9HFey0GYZyU41lI

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