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GATE 2017 ME (ME2) – Question 5

General Aptitude · Analytical Aptitude: Logical Reasoning and Deduction · 1 mark · Multiple choice

P looks at Q while Q looks at R. P is married; R is not. The number of pairs in which a married person looks at an unmarried person is ______.

  1. 0
  2. 1
  3. 2
  4. Cannot be determined

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Show answer and explanation

Correct answer: (B) 1

Explanation

If Q is unmarried, P→Q is the single married-to-unmarried pair. If Q is married, Q→R is the single such pair. In either case exactly **one pair, B** qualifies. Unknown marital status of Q does not prevent determining the count.