Ex 10.4 Class 9 Maths Ganita Manjari Solutions | Sid Classes
Welcome to Sid Classes, your trusted destination for comprehensive academic resources! In this detailed study guide, we present complete, step-by-step solutions for the NCERT Class 9 Maths Ganita Manjari Chapter 10 Exercise 10.4 Interpreting Charts and Data Visualisation. Designed to reflect how top-scoring students write their solutions and reasoning in school examinations, this walkthrough covers IUCN Red List stacked column charts, cricket career statistics, table data analysis, and custom-coded visual bar representations entirely clear.
🔑 Key Concepts & Data Interpretation Guidelines:
- Stacked Column/Bar Charts: Used to display composite data where each bar represents a total divided into multiple sub-categories (segments).
- Comparative Analysis: Reading values from both vertical axes (totals) and individual segment heights (component breakdown).
NCERT Class 9 Maths Ganita Manjari Chapter 10 Exercise 10.4 Solutions
Question 1
The following stacked column chart shows the number of animal species in the IUCN Red List, by class, over time.
(i) What does the number 14,234 on the top of the column 2019 represent?
(ii) Approximately how many reptile species were in the list in 2016?
(iii) Which class(es) of species have seen a relatively small increase in count between 2007 and 2019?
Solution:
(i) The number 14,234 represents the total number of assessed animal species across all classes included in the IUCN Red List for the year 2019.
(ii) By examining the stacked segment for reptiles in the 2016 column, there were approximately 1,500 to 1,800 reptile species listed.
(iii) Classes such as birds and mammals have seen relatively stable or smaller proportional increases in count compared to the sharp growths seen in insects and other invertebrates.
Question 2
The wickets taken by a bowler in International Cricket matches till 2025 are shown in the table. Complete the given stacked bar charts (the bar lengths can be approximate).
Given Data Table (Wickets till 2025):
| Format | Test | ODI | T20 | Total |
|---|---|---|---|---|
| Home | 62 | 100 | 32 | 194 |
| Overseas | 172 | 49 | 71 | 292 |
| Total | 234 | 149 | 103 | 486 |
Solution:
(i) Comparing Total Wickets Taken at Home vs. Overseas (Scale up to 300):
(ii) Total Wickets Taken in Each Format (Home vs. Overseas Breakdown):
Frequently Asked Questions (FAQs)
Q1: How do you read stacked column or bar charts effectively?
A: Read the total height of the column for the aggregate value, and measure individual segment heights to compare component parts.
Q2: Why are HTML/CSS flexbox charts preferred for web articles?
A: They load instantly, are fully responsive on mobile devices, and require no external image assets.
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Last updated according to the latest NCERT Ganita Manjari syllabus.