Exercise 12.2 Class 9 Maths | Mean, Median & Mode | Lecture 97
Автор: MathWala Abu Bakar
Загружено: 2026-01-04
Просмотров: 22
Описание:
Welcome back to the series! In Lecture 97, we are tackling Exercise 12.2, focusing on the core concepts of Basic Statistics. This video provides step-by-step solutions to problems involving the calculation of Mean, Median, and Mode for both discrete values and grouped frequency distributions.
Topics Covered in this Lecture:
00:00 Introduction
00:20 Question no 10
07:18 Question no 11
18:22 Question no 12
Ungrouped Data Analysis: Finding the Median and Mode for hostel attendance (Problem 10).
Mean via Deviation: Learn how to calculate the Arithmetic Mean when a deviation D = A - 20 is provided.
Grouped Data Calculations: Mastering the formulas for Median and Mode when dealing with class intervals and frequencies (Problem 11).
Average Age Word Problem: Handling complex units (years, months, days) to find the sum and the new average after data changes (Problem 12).
Whether you are preparing for your board exams or just brushing up on your statistics, this lecture breaks down these complex formulas into easy-to-follow steps.
Download the Exercise 12.2 Solution PDF:
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