यदि \( \binom{n}{4}=\binom{n}{2} \) और \( n\ge 4 \) है, तो ( n ) का मान क्या है?
If \( \binom{n}{4}=\binom{n}{2} \) and \( n\ge 4 \), what is the value of ( n )?
Explanation opens after your attempt
Correct Answer
D. (6)
Concept
By symmetry, (4=n-2), so (n=6). In exams, when \( \binom{n}{r}=\binom{n}{s} \), check (r=s) or (r+s=n).
Why this answer is correct
The correct answer is D. (6). By symmetry, (4=n-2), so (n=6). In exams, when \( \binom{n}{r}=\binom{n}{s} \), check (r=s) or (r+s=n).
Exam Tip
सममिति से (4= n-2), इसलिए (n=6) है। परीक्षा में \( \binom{n}{r}=\binom{n}{s} \) हो तो (r=s) या (r+s=n) जाँचें।
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