\(^{n}C_r\) की derivation में division principle कब उपयोग होता है?
When is the division principle used in the derivation of \(^{n}C_r\)?
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Correct Answer
A. जब extra repeated orders हटाने होंWhen extra repeated orders must be removed
Concept
When making combination from permutation the same selection is counted (r!) times. In exams use division principle when overcounting appears.
Why this answer is correct
The correct answer is A. जब extra repeated orders हटाने हों / When extra repeated orders must be removed. When making combination from permutation the same selection is counted (r!) times. In exams use division principle when overcounting appears.
Exam Tip
Permutation से combination बनाते समय एक ही selection (r!) बार गिना जाता है। परीक्षा में overcounting दिखे तो division principle लगाएँ।
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