📄 Exercise 12.2
Learn and practice Class 9 Mathematics Exercise 12.2 on Information Handling with step-by-step solutions. This page includes free downloadable notes and solved examples aligned with the PECTAA 2025 syllabus.
Quick Links:
Chapter 1
Real Numbers
Chapter 2
Logarithms
Chapter 3
Sets and Functions
Chapter 4
Factorization and Algebraic Manipulation
Chapter 5
Linear Equations and Inequalities
Chapter 6
Trigonometry
Chapter 7
Coordinate Geometry
Chapter 8
Logic
Chapter 9
Similar Figures
Chapter 10
Graphs of Functions
Chapter 11
Loci and Construction
Chapter 12
Information Handling
Chapter 13
Probability
Exercise 12.2 - Information Handling
This exercise focuses on calculating measures of central tendency including arithmetic mean, median, mode, and weighted mean for both ungrouped and grouped data.
Exercise 12.2 provides comprehensive practice problems that help students master the calculation and application of various statistical measures used in information handling and data analysis.
The exercise covers multiple calculation methods including direct method, shortcut method, and coding method for finding arithmetic mean, along with detailed procedures for determining median and mode from frequency distributions.
Key Topics Covered
- Arithmetic mean calculation for ungrouped and grouped data
- Median determination for both odd and even number of observations
- Mode identification and calculation for frequency distributions
- Weighted mean applications in real-life scenarios
- Shortcut and coding methods for efficient calculations
- Comparison of different measures of central tendency
Important Note:
Understanding when to use each measure of central tendency is crucial. The mean is affected by extreme values, the median represents the middle value, and the mode indicates the most frequent value. Weighted mean is used when different observations have different levels of importance.
Created by Hira Science Academy | Aligned with PECTAA 2025 Syllabus