\(^{n}C_r\) की व्युत्पत्ति में कौन-सा सिद्धांत सबसे सीधे उपयोग होता है?
Which principle is used most directly in the derivation of \(^{n}C_r\)?
Explanation opens after your attempt
C. पहले क्रमबद्ध गिनती फिर अतिरिक्त (r!) क्रम हटानाCount ordered arrangements first then remove extra (r!) orders
Concept
Combination is obtained by removing (r!) internal orders from permutation. In exams make the ordered count first and then divide.
Why this answer is correct
The correct answer is C. पहले क्रमबद्ध गिनती फिर अतिरिक्त (r!) क्रम हटाना / Count ordered arrangements first then remove extra (r!) orders. Combination is obtained by removing (r!) internal orders from permutation. In exams make the ordered count first and then divide.
Exam Tip
Combination को permutation से (r!) आंतरिक क्रम हटाकर निकाला जाता है। परीक्षा में पहले ordered count बनाकर फिर divide करें।
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