Class 9 NCERT • Ganita Manjari Part II (New Syllabus)
Ch 10: How Quantities Combine: Understanding Data
Select a topic or study module below to explore data collection, advanced bar charts, weighted averages, mixture and alloy concentrations, survey metrics, data inferences, and textbook solutions.
Topic 01 • Data Collection
Understanding Primary & Secondary Data, Tally Marks, and Frequency Distribution Tables
Topic 02 • Graphical Representation
Exploring Bar Charts, Pie Charts, Histograms, and Frequency Polygons
Topic 03 • Stacked Bar Charts
Analyzing Multi-Category Comparisons, Proportional Shares, and Data Interpretations
Topic 04 • Weighted Averages
Calculating Means for Groups with Varying Sizes Using Weighted Average Formulas
Topic 05 • Mixtures & Concentrations
Solving Practical Problems Involving Percentage Concentrations, Solutions, and Alloys
Topic 06 • Survey Analysis
Combining Metrics with Specific Weight Ratios Like Customer Feedback or Fitness Scores
Topic 07 • Inferences & Statistics
Drawing Valid Conclusions and Spotting Common Interpretation Pitfalls in Graphs
Module 08 • Solutions & Quiz