Tables, Graphs, and Charts
SSC GD Exam Preparation - Quantitative Aptitude
Data Interpretation is a key part of Quantitative Aptitude in exams like SSC MTS, Delhi Police, Railway, and other competitive exams. It tests your ability to analyze data and draw conclusions quickly.
🔹 1. What is Data Interpretation?
Definition:
Data Interpretation involves reading data presented in tables, charts, or graphs and solving questions based on it. It evaluates your analytical skills, reasoning, and numerical ability.
Purpose:
Interpret numerical information
Answer questions quickly and accurately
Analyze patterns, trends, and relationships
🔹 2. Types of Data Presentation
| Type | Description | Example |
|---|---|---|
| Tables | Data arranged in rows and columns | Sales of products over months |
| Bar Graphs | Data represented by rectangular bars | Population of cities |
| Line Graphs | Data represented with points connected by lines | Profit trends over years |
| Pie Charts | Data shown as proportions of a circle | Market share of companies |
| Mixed Graphs | Combination of bar, line, or pie charts | Multi-variable comparison |
🔹 3. Key Tips for Solving DI Questions
Read the instructions carefully
Observe units and totals in tables/charts
Look for trends, differences, and percentages
Perform calculations step by step
Use approximation for faster solutions
Label your intermediate steps to avoid mistakes
Check scale and units in graphs
Practice mental calculations for speed
🔹 4. Common Formulas Used
| Concept | Formula / Method |
|---|---|
| Percentage | (Part / Whole) × 100 |
| Profit / Loss | Profit = Selling Price – Cost Price |
| Ratio | Part : Part or Part : Whole |
| Average | Sum of observations / Number of observations |
| Pie Chart Angle | (Value / Total) × 360° |
🧠 Practice Section: 15 Questions (With Answers)
Table Data Example:
| Month | Product A | Product B | Product C |
|---|---|---|---|
| Jan | 120 | 80 | 100 |
| Feb | 150 | 90 | 110 |
| Mar | 130 | 100 | 120 |
Q1. What is the total sale of Product A in three months?
View Answer
120 + 150 + 130 = 400
Q2. Which product had the highest sale in Feb?
View Answer
Product A (150 units)
Q3. Average sale of Product B over three months?
View Answer
(80 + 90 + 100) / 3 = 270 / 3 = 90
Q4. Percentage contribution of Product C in Mar to total sales in Mar?
View Answer
Total sales Mar = 130+100+120=350
Product
C% = (120/350)×100 ≈ 34.29%
Q5. Difference between sales of Product A and B in Jan?
View Answer
120 – 80 = 40
Q6. Total sales of all products in Feb?
View Answer
150 + 90 + 110 = 350
Q7. Product with lowest total sale in three months?
View Answer
Product B (80+90+100=270)
Q8. If each product is priced at ₹10/unit, total revenue in Mar?
View Answer
130+100+120=350 units × ₹10 = ₹3500
Q9. If Product B sales increase by 10 units in Apr, new total sales?
View Answer
Previous total = 80+90+100=270 → New total = 270+10=280
Q10. Sale ratio of Product A to Product C in Jan?
View Answer
120:100 = 6:5
Q11. Average monthly sale of Product C?
View Answer
(100+110+120)/3 = 330/3 = 110
Q12. Percentage increase of Product A from Jan to Feb?
View Answer
(150–120)/120×100 = 25%
Q13. Difference between total sales of Jan and Mar?
View Answer
Jan total = 120+80+100=300; Mar total=350 → Difference = 50
Q14. Total units sold over three months for all products?
View Answer
(120+150+130)+(80+90+100)+(100+110+120)=400+270+330=1000 units
Q15. If 10% of Product C units are defective in Feb, how many are defective?
View Answer
110 × 10% = 11 units
✅ SSC GD Exam Strategy
🟢 Practice reading tables and graphs quickly
🟢 Master percentage and ratio calculations
🟢 Learn to identify trends and patterns in data
🟢 Use approximation techniques for speed
🟢 Time yourself - aim for 60-90 seconds per DI set
You've completed Data Interpretation!
SSC GD Tip: Mastering Data Interpretation requires regular practice with different types of charts and tables. Focus on improving your calculation speed and accuracy. Learn to quickly identify what the question is asking and which data points are relevant. Practice mental math for percentages, averages, and ratios. Regular practice with previous year SSC GD questions will build your confidence and speed in solving DI problems efficiently.
Master Data Interpretation for SSC GD Exam!
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