CLASS 11th | SETS - LECTURE 08 | NCERT BOOKS EXAMPLES 20 to 22 | MATHS - By Dev Sir🔥

📘 *NCERT Class 11 Maths | Chapter 1: Sets ✨ Examples 20–22 Fully Solved! 🔥 Step-by-Step Guide | Sets Part-8* Welcome to *Part-8* of the most comprehensive *Class 11 Maths Series* on YouTube! In this video, we focus on solving *Examples 20 to 22* from *Chapter 1: Sets* of the *NCERT Class 11 Mathematics textbook**. This video is meticulously designed to help students **understand the logic, solve efficiently, and score confidently* in both school exams and competitive entrances. This lesson is presented by *Dev Sir**, a highly experienced mathematics educator with **10+ years of teaching expertise**. Dev Sir has guided thousands of students across **Class XI, XII, B.Sc., and competitive exams* and is known for his **concept-based teaching, friendly approach, and exam-oriented techniques**. --- 🎓 *Meet Your Educator – Dev Sir* 👨‍🏫 With over **a decade of experience**, Dev Sir has built a reputation for delivering high-impact mathematics lectures that are conceptually strong and exam-focused. He has mentored students for: CBSE & CHSE Class XI/XII Board Exams B.Sc. Mathematics (Hons & Pass) Competitive Exams like OSSC, OPSC, OSSSC, CT, BED, SSC, and more His unique teaching style blends: ✅ Concept clarity ✅ Real-life applications ✅ Short tricks for competitive exams ✅ Visual methods (like Venn Diagrams) for easy problem-solving Dev Sir’s mission is to make *Mathematics simple, relatable, and powerful* for every student. --- 🔍 *What’s Covered in This Video (Sets Part-8):* Step-by-step explanation of *Examples 20, 21 & 22* from NCERT Sets Use of *Venn diagrams* to simplify complex data Application of set operations: Union, Intersection, Difference, and Complement Understanding of **finite and infinite sets**, **cardinality**, and logical deductions Quick methods to approach typical exam questions Common student mistakes – and how to avoid them! 🎯 This video is perfect for: Class 11 students (CBSE, CHSE Odisha, & other boards) CHSE Odisha students preparing for council exams B.Sc. students needing a strong foundational revision Aspirants of *Odisha Govt. Jobs & entrance exams* needing conceptual math clarity --- 📚 *Importance of Chapter 1: Sets in Your Curriculum* Sets are a *building block for higher mathematics* and frequently appear in chapters like: Relations and Functions Probability Mathematical Reasoning Vectors and Logic in B.Sc & Competitive Papers **Mastering Sets = Strong base for future success in mathematics**! --- 📌 *disha247 – Empowering Learners Across Odisha* Your one-stop destination for: School-level Maths (Class XI, XII) University-level Maths (B.Sc & beyond) Competitive Mathematics (OPSC, OSSC, OSSSC, CT, BED, etc.) Govt. job updates, strategies & exam tips --- 🔗 *Stay Connected with disha247 & Dev Sir* 🎥 YouTube: [@disha247official](   / @disha247official  ) 📸 Instagram: [@disha247official](  / disha247official  ) 📘 Facebook: [Disha247 Official](  / disha247official  ) 💬 WhatsApp Channel: [Join Here](https://whatsapp.com/channel/0029VbA0...) Join thousands of Odisha students who are learning smarter, scoring higher, and growing faster with **disha247**! --- 🔥 *Support Our Mission:* ✅ Like the video ✅ Drop your doubts or thanks in the comments ✅ Subscribe to the channel and hit the 🔔 bell icon ✅ Share this with your friends who want to *ace Maths with confidence* --- 🎬 *Related Videos to Watch Next:* 🔹 Sets Part-7 (Examples 11–19): \[Link] 🔹 Sets Part-6 (Examples 9–11): \[Link] 🔜 Upcoming: Relations & Functions – Full Series --- 📌 *Popular Hashtags:* \#MathWithDevSir #NCERTMaths #Class11Sets #DevSirMaths #disha247 #SetTheory #OdishaJobs #Class11CBSE #CHSEOdisha #BScMaths #MathsLecture #OdishaGovtExam #NCERTExamplesSolved #MathematicsWithDevSir #ConceptMaths #MathsSimplified ---