Class 9 Maths | Unit 3 Exercise 3.2 Q7 & Q8 | Cardinality of set | Lecture 27

In this video, we will cover Class 9 Maths | Unit 3 Exercise 3.2 Questions 7 & 8 from the topic Sets.
Learn how to find the Cardinal Value of Sets using the Inclusion and Exclusion Rule with detailed explanation and step-by-step solutions.
We’ll also explain the formula for n(A ∪ B) and how to apply it in different types of questions.

📘 Topics Covered:

Cardinal value of sets

Inclusion and exclusion principle

Formula: n(A ∪ B) = n(A) + n(B) – n(A ∩ B)

Step-by-step solution of Q7 & Q8

Easy explanation for Class 9 students


🎯 Lecture 27 | Unit 3: Sets
Perfect for Class 9 Mathematics (Federal & Punjab Boards) students preparing for exams.

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