(^{n}P_2=n(n-1)) किस विचार से मिलता है?
Which idea gives (^{n}P_2=n(n-1))?
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Correct Answer
C. दो क्रमबद्ध स्थान भरनाFilling two ordered positions
Concept
There are (n) choices for the first place and (n-1) for the second. In exams use the multiplication principle for ordered pairs.
Why this answer is correct
The correct answer is C. दो क्रमबद्ध स्थान भरना / Filling two ordered positions. There are (n) choices for the first place and (n-1) for the second. In exams use the multiplication principle for ordered pairs.
Exam Tip
पहले स्थान के लिए (n) और दूसरे के लिए (n-1) विकल्प होते हैं। परीक्षा में ordered pair में multiplication principle लगाएँ।
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