पास्कल संबंध \(^{n}C_r=^{n-1}C_r+^{n-1}C_{r-1}\) किस counting idea से आता है?
From which counting idea does Pascal's relation \(^{n}C_r=^{n-1}C_r+^{n-1}C_{r-1}\) come?
Explanation opens after your attempt
A. एक विशेष वस्तु को शामिल या अलग करने सेBy including or excluding one special object
Concept
The total selection is split into two cases according to whether one special object appears or not. In exams remember the fixed object method.
Why this answer is correct
The correct answer is A. एक विशेष वस्तु को शामिल या अलग करने से / By including or excluding one special object. The total selection is split into two cases according to whether one special object appears or not. In exams remember the fixed object method.
Exam Tip
कुल चयन को एक विशेष वस्तु के आने और न आने के दो मामलों में बाँटते हैं। परीक्षा में fixed object method याद रखें।
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