यदि \(^{n}C_r=^{n}C_{r+2}\) हो तो कौन-सा relation संभव है?
If \(^{n}C_r=^{n}C_{r+2}\) which relation is possible?
Explanation opens after your attempt
Correct Answer
A. (r+r+2=n)
Concept
In equal combinations the lower indices are equal or complementary. Here the indices are different so (r+(r+2)=n).
Why this answer is correct
The correct answer is A. (r+r+2=n). In equal combinations the lower indices are equal or complementary. Here the indices are different so (r+(r+2)=n).
Exam Tip
Equal combinations में lower indices समान या पूरक होते हैं। यहाँ अलग indices हैं इसलिए (r+(r+2)=n) होगा।
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