किस (n) के लिए (\frac{(n+5)!}{(n+3)!}=210) होगा?
For which (n) will (\frac{(n+5)!}{(n+3)!}=210)?
Explanation opens after your attempt
B. (9)
Concept
((n+5)(n+4)=210). Since \(14\times15=210\), (n+4=14) gives (n=10).
Why this answer is correct
The correct answer is B. (9). ((n+5)(n+4)=210). Since \(14\times15=210\), (n+4=14) gives (n=10).
Exam Tip
((n+5)(n+4)=210) है। \(14\times15=210\) से (n=10) नहीं बल्कि (n+4=14) होने पर (n=10) मिलता है।
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