यदि \(\binom{n}{1}+\binom{n}{2}=105\) है तो (n) का मान क्या है?
If \(\binom{n}{1}+\binom{n}{2}=105\), what is the value of (n)?
Explanation opens after your attempt
Correct Answer
C. (14)
Concept
It gives (n+\frac{n(n-1)}{2}=105). Putting (n=14) gives (14+91=105).
Why this answer is correct
The correct answer is C. (14). It gives (n+\frac{n(n-1)}{2}=105). Putting (n=14) gives (14+91=105).
Exam Tip
यह (n+\frac{n(n-1)}{2}=105) देता है। (n=14) रखने पर (14+91=105) मिलता है।
Login to save your score, XP, coins and progress.