\(^{9}C_7\) को छोटे सूचकांक वाले रूप में कैसे लिखेंगे?
How will \(^{9}C_7\) be written using a smaller index?
Explanation opens after your attempt
B. \(^{9}C_2\)
Concept
By \(^{n}C_r=^{n}C_{n-r}\) we get \(^{9}C_7=^{9}C_2\). In exams use the smaller index to reduce calculation.
Why this answer is correct
The correct answer is B. \(^{9}C_2\). By \(^{n}C_r=^{n}C_{n-r}\) we get \(^{9}C_7=^{9}C_2\). In exams use the smaller index to reduce calculation.
Exam Tip
संबंध \(^{n}C_r=^{n}C_{n-r}\) से \(^{9}C_7=^{9}C_2\) है। परीक्षा में calculation घटाने के लिए छोटा index लें।
Login to save your score, XP, coins and progress.
