Worked Example
Revision challenge 9
For Class 7 Mathematics, explain or solve a bar graphs and double bar graphs question from the chapter "Data Handling". Focus on revision challenge and show the working clearly.
Step-by-step solution path
- Read the topic idea: Bar Graphs and Double Bar Graphs.
- Recall the core explanation from the chapter: Mean, median, mode, range and drawing bar graphs, histograms.
- Use the related formula "Mean" as the main tool while solving.
- Write the reasoning in simple school-level language before the final answer.
Final learning answer
This example is centred on Bar Graphs and Double Bar Graphs. A strong solution should identify the correct data, apply Mean, and explain each transition instead of jumping directly to the answer.
Related formula
Mean
Mean = Sum of all observations / Total number