\(^{n}C_r\) की factorial derivation में (r!) और ((n-r)!) दोनों क्यों आते हैं?
Why do both (r!) and ((n-r)!) appear in the factorial derivation of \(^{n}C_r\)?
Explanation opens after your attempt
A. चुने और न चुने groups के internal orders हटाने के लिएTo remove internal orders of chosen and unchosen groups
Concept
In the (n!) count, the orders inside both groups are counted extra. In exams understand both corrections (r!) and ((n-r)!).
Why this answer is correct
The correct answer is A. चुने और न चुने groups के internal orders हटाने के लिए / To remove internal orders of chosen and unchosen groups. In the (n!) count, the orders inside both groups are counted extra. In exams understand both corrections (r!) and ((n-r)!).
Exam Tip
(n!) वाली गिनती में दोनों groups के अंदर के क्रम extra गिने जाते हैं। परीक्षा में (r!) और ((n-r)!) दोनों corrections समझें।
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