If m parallel lines in a plane are intersected by a family of n parallel lines, the number of parallelogram formed is 

Mathematics becomes truly engaging with Chapter 6: Permutations and Combinations in the NCERT textbook for Class 11th (CBSE 2024-2025). This chapter dives into the fascinating world of counting, arrangement and selection, covering key concepts like factorial notation, permutations, combinations and their real-life applications. It serves as a foundation for advanced topics such as probability and statistics, making it an essential part of the curriculum. The chapter includes MCQ questions that challenge students to think critically and apply their knowledge effectively. These questions are excellent tools for self-assessment and exam preparation, helping students build confidence and precision in problem-solving. By mastering this chapter, students develop logical reasoning and analytical skills, which are crucial for excelling in academics and beyond. Permutations and combinations open doors to a deeper understanding of mathematics and its practical significance.