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GATE 2021 MT – Question 1

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

Five persons P, Q, R, S, T sit in a row facing the same direction. P and T cannot sit at either end; P must not sit adjacent to S; R is second from the left. The number of distinct arrangements is ______.

  1. 2
  2. 3
  3. 4
  4. 5

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Show answer and explanation

Correct answer: (B) 3

Explanation

R is fixed second; P and T must occupy positions 3 and 4. If P is third, Q and S can occupy the ends in two ways. If P is fourth, S cannot be fifth, leaving only S first and Q fifth. Total **3, B**.