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RRB Group D Tables

Study Material — 7 PYQs (2020–2020) · Concept Notes · Shortcuts

RRB Group D Tables is a frequently tested subtopic — 7 previous year questions from 2020–2020 papers are included below with concept notes, key rules and shortcut tricks.

7 PYQs
2020–2020
30 Practice
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10 Key Points
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Previous Year Questions

RRB Group D Tables — Past Exam Questions

7 questions from actual RRB Group D papers · all shown free · click option to reveal solution

Exam Q 12020Previous Year Pattern

What is the ratio of the number of students who failed in Department B to the number of students who failed in Department D?

Exam Q 22020Previous Year Pattern

What is the total number of students who appeared in the examination across all five departments?

Exam Q 32020Previous Year Pattern

What is the average number of students who appeared across all five schools in the year 2021?

Exam Q 42020Previous Year Pattern

By what percentage did the number of students who appeared from School E increase from 2020 to 2021?

Exam Q 52020Previous Year Pattern

What is the pass percentage of School C in the year 2021?

Exam Q 62020Previous Year Pattern

What is the average number of students who passed per department across all five departments?

Exam Q 72020Previous Year Pattern

What is the ratio of total students who passed from School A and School B together in 2020 to those who passed from School D and School E together in 2020?

Concept Notes

Tables— Rules & Concept

Core ConceptRead this first — the foundation of the topic

Tables in Data Interpretation are structured arrangements of data in rows and columns. They present numerical information about various parameters like sales, production, population, etc. In SSC CGL, table-based DI questions are guaranteed to appear in every paper, usually 3-5 questions per table. Key Rules for Table Analysis:

1. Always read the title and column headers first 2. Identify what each row and column represents

3. Check for units mentioned (lakhs, crores, percentage, etc.) 4. Look for missing data or symbols like '-' or '*'

5. Understand the time period covered Common Question Types:

• Finding totals, averages, and percentages • Comparison between years/categories

• Growth rate calculations • Ratio and proportion problems

• Maximum/minimum value identification

Formula BlockMemorise — at least one formula appears in every paper
Percentage increase = [(New Value - Old Value) / Old Value] × 100
Average = Sum of all values / Number of values
Ratio = First value : Second value (in simplest form)

Shortcut 1 - Quick Percentage Calculation:

To find X% of Y, use: X × Y ÷ 100

For 25%: Divide by 4

For 20%: Divide by 5

For 12.5%: Divide by 8

Shortcut 2 - Average Estimation:

When finding average of 5-6 numbers, pick a round number close to all values. Calculate differences and adjust.

Shortcut 3 - Ratio Comparison:

To compare ratios quickly, cross-multiply. For a/b vs c/d, compare a×d with b×c.
Worked ExampleSolve this step-by-step before moving on
1
Step 1

Find total sales = 120 + 150 + 180 + 90 + 160 = 700 lakhs

2
Step 2

Company C's sales = 180 lakhs

3
Step 3

Percentage = (180/700) × 100 = 18/7 × 10 = 25.71% Answer: Approximately 25.7% Worked Example 2: Production table shows Year 2019: 240 units, Year 2020: 180 units Question: Find percentage decrease from 2019 to 2020.

1
Step 1

Decrease = 240 - 180 = 60 units

2
Step 2

Percentage decrease = (60/240) × 100

3
Step 3

= (1/4) × 100 = 25% Answer: 25% decrease

Exam PatternsWhat examiners ask — read before attempting PYQs
Recognition

• Tables usually have 4-6 rows and 4-7 columns • Data often represents years (2015-2020) or categories • Questions test calculation speed and accuracy • Answer choices are often close, requiring precise calculation • Time allocation: Maximum 2-3 minutes per question Most Common Trap - The #1 Mistake: Students often miss the UNITS mentioned in table headers. A table showing '245' with header 'Sales (in crores)' means 245 crores, not 245 rupees. This unit confusion leads to wrong final answers even with correct calculations. Always circle the units before starting calculations

Time-Saving Techniques

• Use approximation for complex calculations when answer choices are far apart • Eliminate obviously wrong options first • For percentage questions, convert to fractions when possible • Practice mental math for common calculations (squares, percentages, ratios) Success Strategy: Table DI is purely calculation-based. Focus on accuracy over speed initially. Build calculation speed through regular practice. Master basic arithmetic operations and percentage calculations.

These questions are scoring if approached systematically.

Key Points to Remember

  • Always read table title and column headers before attempting questions
  • Check units carefully - crores, lakhs, thousands, or absolute numbers
  • Percentage increase formula: [(New - Old)/Old] × 100
  • Quick percentage trick: 25% = ÷4, 20% = ÷5, 12.5% = ÷8
  • Average = Sum of all values ÷ Number of values
  • Ratio comparison shortcut: For a/b vs c/d, compare a×d with b×c
  • Tables typically have 4-6 rows and 4-7 columns in SSC CGL
  • Allocate maximum 2-3 minutes per table question
  • Practice approximation when answer choices are far apart
  • Focus on calculation accuracy - most errors occur in basic arithmetic

Exam-Specific Tips

  • SSC CGL papers contain 3-5 questions from each table in DI section
  • Table DI questions carry 2 marks each with negative marking of 0.5
  • Common table formats show data for 5-year periods (2016-2020 pattern)
  • Units frequently used: lakhs, crores, thousands, percentage, absolute numbers
  • Time period data most common: years, quarters, months in chronological order
  • Maximum 6-7 companies/states/products typically shown in one table
  • Percentage calculations appear in 60-70% of table-based questions
  • Growth rate and comparison questions form 40% of table DI questions
Practice MCQs

Tables — Practice Questions

30graded MCQs · easy to hard · full solution & trap analysis · showing 20 of 30

All MCQs →
Practice 1easy

What is the average monthly sales of Product D over the 6-month period?

Practice 2easy

By how much did the sales of Product A increase from January to June?

Practice 3easy

What is the percentage increase in sales of Product B from February to May?

Practice 4easy

By how much did the sales of Product A increase from January to May?

Practice 5easy

Which product had the highest sales in March?

Practice 6easy

What is the average monthly sales of Product C from January to May?

Practice 7easy

In March, which product had the highest sales?

Practice 8easy

What is the total sales of Product C for the entire 6-month period?

Practice 9easy

What is the total sales of Product B from January to May?

Practice 10easy

What is the ratio of Product D's sales in any month to Product E's sales in May?

Practice 11medium

Which factory maintained constant production throughout all four quarters?

Practice 12medium

What is the average production of Factory B across all four quarters?

Practice 13medium

Which factory maintained constant production throughout all four quarters?

Practice 14medium

What is the ratio of Factory D's Q4 production to Factory E's Q4 production?

Practice 15medium

What is the total production of all factories in Q2?

Practice 16medium

By what percentage did Factory A's production increase from Q1 to Q4?

Practice 17medium

What is the total production of Factory A across all four quarters?

Practice 18medium

By what percentage did Factory D increase its production from Q1 to Q4?

Practice 19medium

What is the average production of Factory B across all four quarters?

Practice 20medium

What is the ratio of total production of Factory E to Factory D across all quarters?

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60-Second Revision — Tables

  • Remember: Check units in table headers before calculating
  • Formula: Percentage change = [(New-Old)/Old] × 100
  • Shortcut: 25%=÷4, 20%=÷5, 50%=÷2 for quick calculations
  • Trap: Don't confuse absolute numbers with percentages in mixed tables
  • Strategy: Eliminate wrong options first, then calculate precisely
  • Time: Maximum 2-3 minutes per question, move on if stuck
  • Accuracy: Double-check final calculation - units and decimal places matter
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