NIMCET 2011
In a row of students, A is 5th from the top and B is 7th from the bottom. C is 6th after A and 6th before B. How many students are there in the row?
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Answer: Option B — 23
Detailed Solution
A is at position from the top; C is places after A, at position .
B is places after C, at position from the top.
B is 7th from the bottom, so the total is .
✓ Check
Below B there are students, so B is 7th from the bottom.⚠ Common trap
Option (A) comes from ; B is counted in both and , so subtract instead of adding it.
Quick tip
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Ask a doubtMore Order & Ranking Questions
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Order & Ranking — Preparation
This question tests your understanding of Order & Ranking, a key topic in the Logical Reasoning section. The detailed solution above uses a step-by-step approach to show the reasoning, and where available, a shortcut that helps you solve similar questions in under 90 seconds during the actual exam.
Order and ranking questions ask about a person's position in a row or class, or compare people by height, weight, age or marks. This topic covers ranks from the top and bottom (or left and right), the total number of people in a row, interchanging positions, and arranging people in order from a set of comparisons. The key formula is total = rank from top + rank from bottom - 1. When two people swap places, find the shift in one person's position to work out the total. For comparison questions, list the people from greatest to smallest as you read each clue, and use the symbols > and < to keep track. Watch for questions where the order cannot be fully determined. Practise the order and ranking questions below, each with a step-by-step solution.