Combination | Lecture 01 | Class 11 | SN Dey

Welcome to Lecture 04 of our Permutation and Combination series! 🎯 In this video, we dive deep into the core theory of Combination (সমবায়), specially tailored for Class 11 Mathematics students following the SN Dey textbook. If you want to build a crystal-clear concept of Combinations from the ground up, this class is for you! We cover the fundamental differences between Permutation and Combination, derive crucial formulas, and explain advanced concepts like restricted combinations, group divisions, and how to find the maximum value of nCr. 📚 Topics Covered in this Lecture: • 0:00 - Introduction • 0:38 - Basic Difference Between Permutation & Combination (বিন্যাস ও সমবায় এর পার্থক্য) • 06:29 - Formula for nCr and its relation to nPr • 08:56 - Proof of nCr = nC(n-r) (গাণিতিক ও লজিক্যাল প্রমাণ) • 14:38 - Proof of nCr + nC(r-1) = (n+1)Cr • 24:18 - Restricted Combination (শর্ত আরোপিত সমবায়) • 34:11 - Division into Groups (দল বিভাজন) • 43:45 - How to find the Maximum Value of nCr (nCr এর বৃহত্তম মান) 💡 Why watch this video? ✓ Complete theory explanation in easy-to-understand Bengali. ✓ Step-by-step mathematical & logical proofs. ✓ Perfect for Class 11 Board Exams & Competitive Entrance preparations. 🔗 Watch the Full Permutation & Combination Playlist Here: 👉    • Permutations & Combinations (বিন্যাস ও সমব...   🔔 Don't forget to LIKE, SHARE, and SUBSCRIBE to Independent math for more detailed conceptual mathematics classes! If you have any doubts about today's topic, feel free to ask in the comment section below. #PermutationAndCombination #Class11Math #SNDey #WBCHSE #Combination #IndependentMath #MathInBengali #Class11Mathematics #nCr #MathsLecture #WBJEE