जब (n) even हो, तो \({}^{n}C_r\) का unique maximum किस (r) पर होता है?
When (n) is even, at which (r) does \({}^{n}C_r\) have a unique maximum?
Explanation opens after your attempt
Correct Answer
A. \(r=\frac{n}{2}\)
Concept
For even (n), the middle index is single. In exams identify the central term by symmetry and ratio.
Why this answer is correct
The correct answer is A. \(r=\frac{n}{2}\). For even (n), the middle index is single. In exams identify the central term by symmetry and ratio.
Exam Tip
Even (n) में middle index single होता है। परीक्षा में symmetry और ratio से central term पहचानें।
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