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RRB Group D Mixed DI (2-graph sets)

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This page covers RRB Group D Mixed DI (2-graph sets) with complete concept notes, 30 graded practice MCQs, key points and exam-specific tips. Free to study.

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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

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

All MCQs →
📊Data / Passage
Directions

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

MonthLaptopsMobilesTabletsHeadphones
Jan1201809060
Feb14020011080
Mar160220130100
Apr180240150120

Table 2: Number of Units Sold

MonthLaptopsMobilesTabletsHeadphones
Jan409045120
Feb5010055160
Mar6011065200
Apr7012075240
Practice 1easy

By what percentage did Laptop sales increase from January to April?

Practice 2easy

What is the average monthly sales (in ₹ thousands) of Headphones across all four months?

📊Data / Passage
Directions

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

MonthLaptopsMobilesTabletsHeadphones
Jan1201806040
Feb1402007550
Mar1602208060
Apr1502107055

TABLE 2: Number of Units Sold

MonthLaptopsMobilesTabletsHeadphones
Jan30904080
Feb3510050100
Mar4011053120
Apr3710547110
Practice 3easy

In which month was the sale of Laptops maximum?

Practice 4easy

What is the ratio of Headphones units sold in February to Headphones units sold in April?

Practice 5easy

What is the total sales (in ₹ thousands) of Mobiles across all four months?

Practice 6easy

What is the average number of Headphones units sold across all four months?

Practice 7easy

By what percentage did Tablet sales (in ₹) increase from January to March?

Practice 8easy

What is the ratio of total Laptop units sold to total Mobile units sold across all four months?

Practice 9easy

What is the total sales (in ₹ thousands) of Mobiles for all four months?

Practice 10easy

In which month was the average price per unit of Tablets the highest?

📊Data / Passage
Directions

Study the following two tables and answer the questions. Table 1: Monthly Sales (in ₹ Lakhs) of Five Electronics Stores

Store NameJanuaryFebruaryMarchApril
TechHub45546372
ElectroMart50556065
GadgetZone40485664
PowerShop60606060
DigitalMax35424956

Table 2: Customer Count (in hundreds) for the Same Stores

Store NameJanuaryFebruaryMarchApril
TechHub15182124
ElectroMart20222426
GadgetZone16192225
PowerShop30303030
DigitalMax14161820
Practice 11medium

What is the percentage increase in sales of TechHub from January to April?

📊Data / Passage
Directions

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

ProductJanuaryFebruaryMarch
Electronics455258
Clothing303336
Home & Garden252832
Sports202225
Books151618

Table 2: Year-on-Year Growth Rate (%) and Target Sales (₹ Lakhs) for March 2024

ProductYoY Growth %Target Sales March 2024
Electronics1565
Clothing1240
Home & Garden1838
Sports1028
Books820
Practice 12medium

What is the total sales (in ₹ Lakhs) for all five product categories combined in February 2024?

Practice 13medium

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

Practice 14medium

What is the average monthly sales (in ₹ Lakhs) for Clothing across Q1 2024?

Practice 15medium

By how much (in ₹ Lakhs) did the actual March 2024 sales of Home & Garden fall short of its target?

Practice 16medium

Which product category showed the highest absolute increase in sales from January to March 2024?

Practice 17medium

Which store has the most consistent sales across all four months (least variation)?

Practice 18medium

What is the average sales per customer (in ₹) for ElectroMart in March?

Practice 19medium

In April, what is the ratio of total sales of GadgetZone to PowerShop?

Practice 20medium

By how much did the total customer count (all stores combined) increase from January to April?

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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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