यदि \( \binom{11}{r}=\binom{11}{r-3} \), तो ( r ) का मान क्या है?
If \( \binom{11}{r}=\binom{11}{r-3} \), what is the value of ( r )?
Explanation opens after your attempt
Correct Answer
B. (7)
Concept
By symmetry, (r+(r-3)=11), so (r=7). In \( \binom{n}{a}=\binom{n}{b} \), often (a+b=n) is useful.
Why this answer is correct
The correct answer is B. (7). By symmetry, (r+(r-3)=11), so (r=7). In \( \binom{n}{a}=\binom{n}{b} \), often (a+b=n) is useful.
Exam Tip
सममिति से (r+(r-3)=11), इसलिए (r=7) है। \( \binom{n}{a}=\binom{n}{b} \) में अक्सर (a+b=n) काम आता है।
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