Table Charts
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Solved Examples
Study MaterialSolved Examples – Table Charts
Solved examples help students understand the practical application of table charts, percentages, averages, ratios, and comparative analysis in Data Interpretation questions. These examples are designed from basic to advanced level and cover important questions frequently asked in SSC, Banking, Railway, Insurance, CAT, CDS, NDA, MBA entrance exams, and various competitive examinations.
Topics Covered in Solved Examples
- Table Reading
- Percentage Calculations
- Average Problems
- Ratio and Difference Analysis
- Maximum and Minimum Values
- Trend Analysis
- Comparative Interpretation
- Quick Approximation Techniques
Study the Following Table Carefully
The following table shows the annual sales (in lakh units) of four companies from 2020 to 2024.
| Year | Company A | Company B | Company C | Company D |
|---|---|---|---|---|
| 2020 | 120 | 150 | 180 | 200 |
| 2021 | 140 | 160 | 210 | 220 |
| 2022 | 170 | 190 | 240 | 260 |
| 2023 | 200 | 210 | 280 | 300 |
| 2024 | 230 | 240 | 320 | 340 |
Example 1: Total Value Calculation
Question: Find the total sales of Company A from 2020 to 2024.
Solution:
Total Sales
= 120 + 140 + 170 + 200 + 230
= 860 lakh units
Answer: 860 lakh units
Example 2: Average Calculation
Question: Find the average sales of Company B over five years.
Solution:
Total Sales of Company B
= 150 + 160 + 190 + 210 + 240
= 950
Average
= 950 / 5
= 190 lakh units
Answer: 190 lakh units
Example 3: Highest Value Identification
Question: Which company recorded the highest sales in 2024?
Solution:
2024 sales:
- Company A = 230
- Company B = 240
- Company C = 320
- Company D = 340
Highest value = 340
Answer: Company D
Example 4: Difference Calculation
Question: Find the difference between sales of Company C and Company A in 2023.
Solution:
Company C sales = 280
Company A sales = 200
Difference
= 280 − 200
= 80 lakh units
Answer: 80 lakh units
Example 5: Percentage Increase
Question: Find the percentage increase in sales of Company A from 2020 to 2024.
Solution:
Old Value = 120
New Value = 230
Increase = 230 − 120 = 110
Percentage Increase
= (110 / 120) × 100
= 91.67%
Answer: 91.67%
Example 6: Ratio Problem
Question: Find the ratio of sales of Company B to Company D in 2022.
Solution:
Company B = 190
Company D = 260
Required Ratio
= 190 : 260
= 19 : 26
Answer: 19 : 26
Example 7: Combined Sales Problem
Question: Find the combined sales of Company C and Company D in 2021.
Solution:
Company C = 210
Company D = 220
Combined Sales
= 210 + 220
= 430 lakh units
Answer: 430 lakh units
Example 8: Approximate Comparison
Question: Approximately what is the average yearly sales of Company D?
Solution:
Total sales:
200 + 220 + 260 + 300 + 340
= 1320
Average
= 1320 / 5
≈ 264
Answer: Approximately 264 lakh units
Example 9: Lowest Value Problem
Question: Which company had the lowest sales in 2020?
Solution:
2020 sales:
- Company A = 120
- Company B = 150
- Company C = 180
- Company D = 200
Lowest value = 120
Answer: Company A
Example 10: Trend Analysis Problem
Question: Which company showed continuous growth from 2020 to 2024?
Solution:
All companies show increasing values every year.
Therefore:
- Company A
- Company B
- Company C
- Company D
show continuous growth.
Answer: All Companies
Example 11: Percentage Share Problem
Question: What percentage of total 2024 sales was contributed by Company C?
Solution:
Total 2024 sales:
230 + 240 + 320 + 340
= 1130
Company C contribution = 320
Percentage
= (320 / 1130) × 100
≈ 28.32%
Answer: 28.32%
Example 12: Comparison Between Two Years
Question: By how much did Company D sales increase from 2021 to 2023?
Solution:
2021 sales = 220
2023 sales = 300
Increase
= 300 − 220
= 80 lakh units
Answer: 80 lakh units
Example 13: Multi-Company Average
Question: Find the average sales of all companies in 2022.
Solution:
Total sales in 2022:
170 + 190 + 240 + 260
= 860
Average
= 860 / 4
= 215 lakh units
Answer: 215 lakh units
Example 14: Fast Approximation Question
Question: Approximately find:
(Company A sales in 2024) ÷ (Company B sales in 2020)
Solution:
230 ÷ 150
≈ 1.53
≈ 1.5
Answer: Approximately 1.5
Example 15: Grand Total Problem
Question: Find total sales of all companies during all years.
Solution:
Company A Total = 860
Company B Total = 950
Company C Total = 1230
Company D Total = 1320
Grand Total
= 860 + 950 + 1230 + 1320
= 4360 lakh units
Answer: 4360 lakh units
Important Exam Tips
- Read headings and units carefully.
- Use approximation whenever possible.
- Improve percentage and average calculations.
- Analyze rows and columns systematically.
- Avoid unnecessary lengthy calculations.
- Practice mental arithmetic regularly.
- Practice previous year Data Interpretation questions.
Common Mistakes to Avoid
- Ignoring units in the table.
- Using wrong row or column values.
- Calculation mistakes in percentages.
- Incorrect data interpretation.
- Skipping important headings.
Practicing solved examples regularly improves analytical thinking, calculation speed, and accuracy in solving Table Chart Data Interpretation questions in competitive examinations.