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RRB NTPC Mixed DI (2-graph sets)

Study Material — 7 PYQs (2018–2018) · Concept Notes · Shortcuts

RRB NTPC Mixed DI (2-graph sets) is a frequently tested subtopic — 7 previous year questions from 2018–2018 papers are included below with concept notes, key rules and shortcut tricks.

7 PYQs
2018–2018
20 Practice
MCQs
8 Key Points
to remember
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Previous Year Questions

RRB NTPC Mixed DI (2-graph sets) — Past Exam Questions

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

📊Data / Passage
Directions

Study the following tables and answer the questions. Table 1: Monthly Sales (in ₹ Lakhs) of Four Product Categories across Q1 2024

MonthElectronicsClothingHome & GardenGrocery
January45322855
February50353060
March60403565

Table 2: Customer Count (in thousands) and Return Rate (%) for Each Category in Q1 2024

CategoryTotal CustomersReturn Rate (%)
Electronics1812
Clothing248
Home & Garden165
Grocery402
Exam Q 12018Previous Year Pattern

If the number of returns (in thousands) equals Customer Count × Return Rate / 100, which category has the highest number of returns?

Exam Q 22018Previous Year Pattern

Which product category has the highest ratio of total customers to return rate?

Exam Q 32018Previous Year Pattern

By what percentage did Electronics sales increase from January to March 2024?

Exam Q 42018Previous Year Pattern

What is the total sales (in ₹ Lakhs) across all four categories for February 2024?

📊Data / Passage
Directions

Study the following tables and answer the questions. Table 1: Quarterly Sales (in lakhs ₹) of Five Companies

CompanyQ1Q2Q3Q4
Alpha120140160180
Beta100110120130
Gamma150145155165
Delta8095110125
Epsilon110115120125

Table 2: Employee Count at End of Each Quarter

CompanyQ1Q2Q3Q4
Alpha240280320360
Beta200220240260
Gamma300300310320
Delta160190220250
Epsilon220230240250
Exam Q 52018Previous Year Pattern

Which company had the highest average quarterly sales across all four quarters?

Exam Q 62018Previous Year Pattern

What is the average employee growth rate from Q1 to Q4 across all five companies?

Exam Q 72018Previous Year Pattern

What is the percentage increase in total sales of Delta from Q1 to Q4?

Concept Notes

Mixed DI (2-graph sets)— Rules & Concept

1.Core Concept

Read this first — the foundation of the topic

Mixed DI tests your ability to extract information from multiple visual formats and combine them to solve complex problems. Questions often require data from both graphs to reach the answer

Key Rules

Always read both graph titles and legends carefully. Identify what each axis represents. Note the units and scales used. Check if data represents absolute numbers, percentages, or ratios.

Look for common elements between both graphs like time periods, categories, or subjects.

2.Exam Patterns

What examiners ask — read before attempting PYQs

SSC CGL typically asks 5 questions per set. Common question types include percentage calculations across graphs, ratio comparisons, finding averages, calculating differences, and trend analysis. Questions may ask for data from one graph only, but often require combining information from both.

3.Shortcuts

Use these to save 30–60 seconds per question
Scan Method

Quickly scan both graphs to understand the relationship between them before reading questions 2

Unit Conversion Trick

When graphs have different units (thousands vs lakhs), convert to same unit immediately to avoid calculation errors

4.Worked Example

Solve this step-by-step before moving on
1
Step 1

Extract production data for 2019 from Bar Chart = 60 thousand cars

2
Step 2

Extract export percentage for 2019 from Line Graph = 30%

3
Step 3

Calculate exported cars = 60,000 × 30/100 = 18,000 cars

4
Step 4

Convert to required unit = 18 thousand cars Answer: 18,000 cars or 18 thousand cars

5.Exam Traps

Common mistakes students make — avoid these

Students often use data from wrong years, mix up absolute numbers with percentages, forget unit conversions, or use data from only one graph when both are required. Another frequent error is misreading scales or legends, especially when graphs use different scales. Time Management: Spend 30 seconds understanding both graphs, then 90 seconds per question. Don't get stuck on complex calculations - use approximation when answer choices are far apart.

Key Points to Remember

  • Mixed DI combines two different graph types with related data themes
  • Always identify the relationship between both graphs before attempting questions
  • Check units and scales carefully - graphs may use different measurement units
  • Most questions require data from both graphs, not just one
  • Convert percentages to absolute numbers using: (Percentage × Total)/100
  • Read graph legends and axis labels completely to avoid misinterpretation
  • Use approximation when answer choices have significant gaps between them
  • Allocate 8-9 minutes total for 5 questions in mixed DI sets

Exam-Specific Tips

  • Mixed DI typically contributes 5 questions worth 10 marks in SSC CGL Tier-II
  • Bar Chart + Line Graph combination appears in 60% of mixed DI questions
  • Questions involving percentage calculations comprise 40% of mixed DI problems
  • Ratio and proportion questions account for 25% of mixed DI question types
  • Time period analysis questions appear in 80% of mixed DI sets
  • Average calculation questions feature in 30% of mixed DI problem sets
  • Unit conversion errors cause 35% of wrong answers in mixed DI sections
Practice MCQs

Mixed DI (2-graph sets) — Practice Questions

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

All MCQs →
📊Data / Passage
Directions

Study the following table and answer the questions. Table 1: Monthly Sales of Electronics Store (in ₹ Lakhs)

MonthLaptopsMobilesTabletsAccessories
Jan121884
Feb1520105
Mar1822126
Apr2025147
May2228168
Jun2530189

Table 2: Number of Units Sold

MonthLaptopsMobilesTabletsAccessories
Jan4018080200
Feb50200100250
Mar60220120300
Apr80250140350
May110280160400
Jun125300180450
Practice 1easy

In which month was the total sales revenue (all products combined) the highest?

Practice 2easy

By what percentage did Laptop sales revenue increase from January to June?

📊Data / Passage
Directions

Study the following tables and answer the questions. Table 1: Monthly Sales of Electronics Store (in ₹ thousands)

MonthLaptopsMobilesTabletsHeadphones
Jan1502008040
Feb18022010050
Mar20024012060
Apr22026014070
May24028016080

Table 2: Number of Units Sold

MonthLaptopsMobilesTabletsHeadphones
Jan301004080
Feb3611050100
Mar4012060120
Apr4413070140
May4814080160
Practice 3easy

What is the total sales (in ₹ thousands) of Mobiles for the months of January to March?

Practice 4easy

What is the average price per unit (in ₹) of Tablets sold in March?

Practice 5easy

In which month was the total sales (all products combined) maximum?

Practice 6easy

What is the total sales revenue (in ₹ Lakhs) for Mobiles across all six months?

📊Data / Passage
Directions

Study the following two tables showing sales data for an electronics company across different regions and quarters, then answer the questions. Table 1: Quarterly Sales (in lakhs ₹) by Region for Year 2023

RegionQ1Q2Q3Q4
North120150180210
South100120140160
East80100120140
West140160180200

Table 2: Product Category Sales (in lakhs ₹) for Q3 and Q4 2023

CategoryQ3Q4
Smartphones180220
Laptops150180
Tablets110140
Accessories80100
Practice 7medium

What is the percentage increase in sales for the North region from Q1 to Q4 2023?

📊Data / Passage
Directions

Study the following two tables showing sales data for TechCorp Ltd. across different regions and quarters, then answer the questions. TABLE 1: Quarterly Sales (in ₹ Lakhs) by Region

RegionQ1Q2Q3Q4
North120150180210
South100120140160
East80100120140
West140160180200

TABLE 2: Product Category Sales (in ₹ Lakhs) - Annual Data

CategorySalesProfitUnits Sold
Software3601441200
Hardware28070700
Services20080400
Support12060600
Practice 8medium

What is the ratio of total annual sales of Software to Services categories?

Practice 9medium

What is the total sales for the West region across all four quarters?

Practice 10medium

By what percentage did Smartphone sales increase from Q3 to Q4 2023?

Practice 11medium

Which region had the highest total sales across all four quarters in 2023?

Practice 12medium

What is the average quarterly sales for the South region in 2023?

Practice 13medium

Which region showed the highest average quarterly sales, and what is that average?

Practice 14medium

What is the profit margin (Profit/Sales × 100) for the Hardware category?

Practice 15medium

By what percentage did North region sales increase from Q1 to Q4?

📊Data / Passage
Directions

Study the following two tables showing sales data for TechCorp Ltd. across different regions and quarters, then answer the questions. TABLE 1: Quarterly Sales (in ₹ Crores) by Region

RegionQ1Q2Q3Q4
North120150180210
South100110121133
East8096115138
West140154169186

TABLE 2: Product Category Sales (in ₹ Crores) - Annual Breakdown

CategoryQ1Q2Q3Q4Annual Total
Software180210252288930
Hardware140160180200680
Services120140173179612
Support00000

Note: Total company sales = Sum of all regions across all quarters = Sum of all product categories across all quarters.

Practice 16hard

Which region showed the highest average quarterly sales across all four quarters?

📊Data / Passage
Directions

Study the following two tables showing production and sales data for a manufacturing company across 6 quarters, and answer the questions. TABLE 1: QUARTERLY PRODUCTION (in units)

QuarterProduct AProduct BProduct CTotal
Q1 202312008006002600
Q2 202314009007003000
Q3 2023160011008003500
Q4 2023180012009003900
Q1 20242000130010004300
Q2 20242200140011004700

TABLE 2: QUARTERLY SALES REVENUE (in ₹ lakhs)

QuarterProduct AProduct BProduct CTotal
Q1 2023360240150750
Q2 2023490315175980
Q3 20236403852001225
Q4 20237204202251365
Q1 20248004552501505
Q2 20248804902751645
Practice 17hard

What is the combined average quarterly revenue for Product C across the first three quarters (Q1, Q2, Q3 of 2023)?

Practice 18hard

By what percentage did the total production increase from Q1 2023 to Q2 2024?

Practice 19hard

If the production growth rate of Product A from Q1 2023 to Q2 2024 continues at the same pace, what would be the expected production of Product A in Q3 2024?

Practice 20hard

What is the percentage increase in North region sales from Q1 to Q4?

60-Second Revision — Mixed DI (2-graph sets)

  • Remember: Read both graph titles and establish the connection between datasets
  • Formula: Percentage to absolute = (Percentage × Base value)/100
  • Trap: Watch for different units between graphs - convert immediately
  • Strategy: Scan both graphs for 30 seconds before reading any question
  • Check: Verify which graph contains the data needed for each calculation step
  • Tip: Use elimination method when calculations become too complex
  • Time: Maximum 90 seconds per question, move on if stuck beyond this limit
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RRB NTPC Mixed DI (2-graph sets) — Study Material, 7 PYQs & Practice MCQs | ZestExam