Quantitative Aptitude – Data Interpretation (DI) Basics (Tables & Charts)
Data Interpretation (DI) involves analyzing data from tables, charts, or graphs and answering questions based on it.
Types of DI
- Table DI
- Bar Graph
- Pie Chart
- Line Graph
Basic Idea
You are given data, and you need to calculate values like total, average, percentage, etc.
Table Example
Sales Data:
A = 100, B = 200, C = 300
Question: Total sales?
Solution:
100 + 200 + 300 = 600 ✔
Percentage Example
Question:
A = 100, Total = 500
Find percentage?
Solution:
(100 / 500) × 100 = 20% ✔
Average Example
Question:
Values = 10, 20, 30
Solution:
Average = (10 + 20 + 30) / 3 = 20 ✔
How to Solve DI
- Read data carefully
- Understand what is asked
- Use formulas quickly
- Avoid unnecessary calculation
Practice Questions
Data: A = 50, B = 100, C = 150
Q1: Total?
Q2: Average?
Q3: Percentage of A?
Answers
Q1: 300
Q2: 100
Q3: 16.67%
Quick Tricks
- Use approximation
- Focus on calculation speed
- Skip lengthy calculations
Final Tip
DI is the most important scoring area. Practice daily to improve speed and accuracy.
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