This chapter explains the different types of sets used in mathematics, such as empty sets, finite and infinite sets, equal sets, and universal sets. Students learn how to identify and classify sets based on their elements and properties. The concept of subsets is introduced in a clear and systematic way, helping students understand how one set can be contained within another.

The chapter also covers proper and improper subsets, power sets, and their practical applications. With clear definitions, examples, and practice questions, students develop logical reasoning skills and gain confidence in solving exam-oriented problems related to sets and subsets.