What is the value of n!/(n – r)! r! if n = 11 and r = 3?
The CBSE 2024-2025 NCERT Maths curriculum for Class 11th Chapter 6 focuses on **Permutations and Combinations**. This chapter introduces fundamental concepts of counting arranging and selecting objects. It covers topics like factorial notation permutations combinations and their applications in real-life problems. Mastering these concepts is essential for solving complex problems in probability and higher mathematics. The chapter includes **MCQ questions** to test understanding and application skills. These questions help students practice and reinforce their knowledge ensuring a strong foundation for competitive exams. Understanding permutations and combinations is crucial for logical reasoning and problem-solving in various fields.
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Choice (b) is correct.
Putting n = 11 and r = 3 in n!/(n – r)! r! , we get
11! / (11 – 3)! 3! = 11 × 10 × 9 × 8!/ 8! × 3 × 2 × 1 = 11 × 5 × 3 = 165
This question related to Chapter 6 maths Class 11th NCERT. From the Chapter 6: Permutations and Combinations. Give answer according to your understanding.
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