संबंध \(^{n}C_r=^{n}C_{n-r}\) किस विचार से सीधे जुड़ा है?
The relation \(^{n}C_r=^{n}C_{n-r}\) is directly connected with which idea?
Explanation opens after your attempt
Correct Answer
B. (r) चुनना और (n-r) छोड़ना समान निर्णय हैंChoosing (r) and leaving (n-r) are equivalent decisions
Concept
Choosing (r) objects is equivalent to not choosing (n-r) objects. In exams use complement selection to identify symmetry.
Why this answer is correct
The correct answer is B. (r) चुनना और (n-r) छोड़ना समान निर्णय हैं / Choosing (r) and leaving (n-r) are equivalent decisions. Choosing (r) objects is equivalent to not choosing (n-r) objects. In exams use complement selection to identify symmetry.
Exam Tip
(r) वस्तुएं चुनना उतना ही है जितना (n-r) वस्तुएं न चुनना। परीक्षा में complement selection से symmetry पहचानें।
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