बिना पुनरावृत्ति (r) स्थान भरने पर \(n^r\) की जगह \(^{n}P_r\) क्यों आता है?
Why does \(^{n}P_r\) appear instead of \(n^r\) when (r) positions are filled without repetition?
Explanation opens after your attempt
Correct Answer
A. क्योंकि हर अगले स्थान पर विकल्प घटते हैंBecause choices decrease at each next position
Concept
Without repetition one object cannot be taken again. In exams pay attention to allowed and not allowed words.
Why this answer is correct
The correct answer is A. क्योंकि हर अगले स्थान पर विकल्प घटते हैं / Because choices decrease at each next position. Without repetition one object cannot be taken again. In exams pay attention to allowed and not allowed words.
Exam Tip
बिना पुनरावृत्ति एक वस्तु दोबारा नहीं ली जा सकती। परीक्षा में allowed और not allowed शब्दों पर ध्यान दें।
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