Data Handling

JCERT · Class 8 · Chapter 16 · Data Handling. Syllabus-aligned topic notes and teaching examples, not a complete textbook answer key.

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Why This Chapter Matters

JCERT · Class 8 · Chapter 16 · Data Handling. Syllabus-aligned topic notes and teaching examples, not a complete textbook answer key.

Before You Begin (Prerequisites)

Revise the relevant ideas from the previous grade.

What You Will Learn (Core Objectives)

Organise data in class intervals and frequency tables. Distinguish bar charts, histograms and pie charts. For equal-width histogram classes, height may represent frequency. With equally likely outcomes, probability is favourable outcomes divided by total outcomes.

Chapter Roadmap & Progression

1 Syllabus, textbook and notes alignm...

2 Concept and method

3 Check and common pitfall

Complete Concept Guide (100% Curriculum Coverage)

Syllabus, textbook and notes alignment

JCERT · Regular schools (Non-SOE) · Class 8 · Chapter 16 — Data Handling
Official syllabus pages 240–261. Official syllabus · Prescribed Hindi book (17 chapters).

These topic notes and teaching examples are not a complete answer key to every textbook exercise. English notes use this same JCERT chapter order; a matching English textbook PDF has not been verified.

Source issue: this chapter’s original DIKSHA PDF is damaged. These are syllabus-aligned topic notes; complete source-question coverage and solutions have not been verified.

Concept and method

Organise data in class intervals and frequency tables. Distinguish bar charts, histograms and pie charts. For equal-width histogram classes, height may represent frequency. With equally likely outcomes, probability is favourable outcomes divided by total outcomes.

Check and common pitfall

Avoid counting class-boundary observations twice; the die is assumed fair.

Key Formulas, Identities & Theorems

Key relationships

Pie angle=(frequency/total)×360°; P(E)=favourable/total

Observe formula conditions and units.

Conceptual Solved Examples & Case Studies

Example 1

Ten of40students prefer a sport. Find its pie-chart angle and the probability of an even number on a fair die.

Step-by-Step Solution:

(10/40)×360°=90°; P(even)=3/6=1/2

Avoid counting class-boundary observations twice; the die is assumed fair.

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