Data Interpretation: Tables & Charts

Data Interpretation does not test raw calculation speed as much as approximation techniques and ratio comparison. Converting 360 degrees of a pie chart to 100% (1% = 3.6 degrees) is essential.

Exam Frequency: 5 to 10 questions in Bank PO Mains, TCS NQT, and Infosys

Essential Formulas & Shortcut Rules

Pie Chart Conversion: Angle (Degrees) = (Percentage / 100) × 360°

1% = 3.6° and 10% = 36°.

Compounded Annual Growth Rate (CAGR) ≈ [(V_final / V_initial)^(1/n) - 1] × 100

Approximated in exams via annual average growth.

Worked Step-by-Step Examples

Example 1: In a company with 1,800 employees, an expense pie chart allocates 72° for employee training and 108° for marketing. What is the total combined expenditure percentage for these two departments?

Step-by-Step Mathematical Derivation:

•Combined angle = 72° + 108° = 180°.

•Total angle in a pie chart = 360°.

•Combined percentage = (180° / 360°) × 100 = 50%.

Answer: 50%

💡 Speed Shortcut: Sum degrees before converting to percentages to cut calculation steps in half.

Common Exam Traps to Avoid

✕Calculating exact values when options are spaced >5% apart (use rounding instead).
✕Reading the wrong axis on dual-axis line graphs.

Interactive Practice Drill (1 Questions)

Instant Explanations • Timed

Assessment Simulator

Data Interpretation: Tables & Charts Practice Drill

1 Questions • No negative marking

15:00

1Data Interpretation: Tables & Charts

medium

The following table shows the number of software engineers hired by four companies across three consecutive years: Company | 2024 | 2025 | 2026 Alpha | 450 | 540 | 630 Beta | 320 | 400 | 520 Gamma | 600 | 660 | 720 Delta | 250 | 350 | 450 Which company recorded the highest percentage increase in recruitment from 2024 to 2026?

Question Palette

0 / 1 Answered

Answered (0)

Marked for Review (0)

Unvisited (1)