Data Interpretation (Table, Bar Graph, Pie Chart, Line Graph)

Reading and calculating from tables, bar graphs, pie charts, and line graphs — applying Percentage and Average to real datasets.

📖 ~4 min read 📐 RRB NTPC / Group D — Mathematics

Format	What It Tests
Table DI	Reading and cross-referencing rows/columns of raw data
Bar Graph	Direct value comparison across categories
Pie Chart	Percentage-of-total distribution; needs conversion to actual values
Line Graph	Trend and rate-of-change reading across time periods

Actual Value = (Given % of pie) × Total Value

💡 Example: A pie chart shows Marketing = 20% of total ₹8,00,000 expense. Marketing amount = 20% × 800000 = ₹1,60,000

⚠️ Some pie charts show angle in degrees instead of %. Convert first: % = (Angle/360) × 100

This free chapter covers the key concepts. For complete coverage with 500+ MCQs, mock tests, and previous year analysis — grab the premium eBook.