Logical Reasoning Linear Ranking, Ordering & Inequalities NUMS 2025
PMDC Verified Question 4 of 17
In a row of students, a student is at 13th position from the left end and at 20th position from the right end. How many students are there in the row?
A
30
B
31
C
32
D
33
Tap any option to test your recall and reveal the step-by-step Propolis autopsy.

Propolis Cognitive Error Autopsy

Official Correct Choice:
Option C: 32
Concept: Single-element Overlap Calculation.

Formula: \(N = L + R - 1\)

Solution:

  • \(N = 13 + 20 - 1 = 32\).


Why other options are incorrect:

• Option D: Adds 1 instead of subtracting.

Quality & Fidelity Assurance: Every question on BeambePrep is rigorously curated against the official PMDC syllabus with zero filler, zero out-of-syllabus content, and zero typos. When an authentic past paper originally contained a historical mistake or ambiguity from the examining board (such as UHS or NUMS), BeambePrep faithfully reflects the original paper while detailing the nuance and scientific consensus in the autopsy above.

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