Measures of Central Tendency

Measures of Central Tendency – Verified PYQ Authority Guide

Measures of Central Tendencyis organised as a topic-level PYQ authority page. It brings together the strongest verified question clusters, exam/year coverage and concept-level practice so students can revise the topic without jumping through unrelated notes. Every factual learning cue below is drawn from the existing verified, published and approved English PYQ corpus or from its Knowledge Graph relationships; the hub does not invent unsupported technical claims.

PYQ evidence snapshot

13 verified PYQsare currently mapped to this Topic hub. The represented years include2025. Exam coverage currently includesRRB NTPC Under Graduate Level. Subject context includesQuantitative Aptitude. These values come from live mappings and can expand automatically when new verified PYQs are added.

Most useful verified PYQs to solve first

Start with the actual questions rather than memorising a generic note. The links below are ranked from the mapped corpus using repeat history and editorial quality, while the complete explanation stays on the individual question page.

1. The mode of the numbers 7, 8, 7, 9, 10 is:
   RRB NTPC Under Graduate Level · 2025 · Mode
   Use the standard Mode method and simplify; the result matches 7.
2. What is the mode of the following data? 53, 46, 55, 53, 40, 48, 53, 47, 41, 54, 43, 55, 54, 51, 43, 42, 44, 47
   RRB NTPC Under Graduate Level · 2025 · Mode
   Use the standard Mode method and simplify; the result matches 53.
3. A teacher records the number of books read by each student in a month: 3, 5, 2, 3, 4, 5, 3, 2, 5, 5. What is the mode of this data set?
   RRB NTPC Under Graduate Level · 2025 · Mode
   Use the standard Mode method and simplify; the result matches 5.
4. What is the mode of the following data: 12, 15, 18, 18, 20, 18, 22, 22, 25, 28, 22, 15, 18, 12?
   RRB NTPC Under Graduate Level · 2025 · Mode
   Use the standard Mode method and simplify; the result matches 18.
5. The following data shows the number of minutes taken by 15 students to complete a mathematics test: 42, 38, 55, 47, 50, 44, 60, 39, 48, 52, 45, 41, 49, 46, 53.…
   RRB NTPC Under Graduate Level · 2025 · Median
   Use the standard Median method and simplify; the result matches 47 minutes.
6. What is the mode of the following data? 40, 47, 54, 45, 50, 43, 53, 52, 53, 49, 40, 50, 42, 52, 44, 52, 47, 55
   RRB NTPC Under Graduate Level · 2025 · Mode
   Use the standard Mode method and simplify; the result matches 52.
7. The median of the given distribution is 28.5. Find the missing frequency x. Class 0-10 10-20 20-30 30-40 40-50 50-60 Frequency 5 x 20 15 7 5
   RRB NTPC Under Graduate Level · 2025 · Median
   Use the standard Median method and simplify; the result matches 8.
8. What is the mode of the following data? 43, 40, 41, 53, 50, 41, 44, 45, 43, 46, 48, 46, 51, 55, 52, 42, 46, 45
   RRB NTPC Under Graduate Level · 2025 · Mode
   Use the standard Mode method and simplify; the result matches 46.

Formula & key-relationship bank from verified solutions

• sin²θ + cos²θ = 1; tanθ = sinθ/cosθ; cotθ = 1/tanθ

Use these as revision triggers and open the linked PYQ before applying a formula numerically; variable definitions and assumptions belong to the exact solved question.

Core ideas repeatedly reinforced by the solved corpus

• Use the standard Mode method and simplify; the result matches 7.
• Use the standard Mode method and simplify; the result matches 53.
• Use the standard Mode method and simplify; the result matches 5.
• Use the standard Mode method and simplify; the result matches 18.
• Use the standard Median method and simplify; the result matches 47 minutes.

Exam tips already validated in SRO solutions

• Identify the Mode relationship before calculation and keep units/bases consistent.
• Identify the Median relationship before calculation and keep units/bases consistent.

Common mistakes to avoid

• Using a shortcut without checking its conditions or using the wrong base/unit.

Topic and concept coverage

Mapped topic labels includeMeasures of Central Tendency. The concept trail includesMode, Median. Use these labels as a revision map: move from the broad area to the narrow concept, solve a verified PYQ, inspect the detailed reasoning, and then attempt another question from the same cluster.

Knowledge Graph navigation

Continue withStatistics,Median,Mode,Quantitative Aptitude,Mode,Median. These are canonical SRO entity links based on the Knowledge Graph and shared question mappings, not keyword-stuffed tag pages.

How to revise this authority page efficiently

1. Solve before reading:answer a mapped PYQ first.
2. Read the exact explanation:verify the correct principle, formula, distractor logic and common mistake on that question page.
3. Move one level in the graph:use the closest concept/sub-topic/topic link rather than opening unrelated content.
4. Reattempt:solve another verified PYQ from this hub and check whether the same error repeats.

Quality scope:this page is automatically maintained from SRO’s verified mapped corpus. It enriches one canonical authority URL instead of generating multiple near-duplicate pages for keyword variants. Manual authority articles are never overwritten by the automated engine.