(9) अलग-अलग पेनों को एक पंक्ति में कितने तरीकों से रखा जा सकता है?
In how many ways can (9) distinct pens be arranged in a row?
Explanation opens after your attempt
Correct Answer
C. (362880)
Concept
The arrangement of (9) distinct objects is (9!). In exams, use factorial directly when all objects are distinct.
Why this answer is correct
The correct answer is C. (362880). The arrangement of (9) distinct objects is (9!). In exams, use factorial directly when all objects are distinct.
Exam Tip
अलग-अलग (9) वस्तुओं की व्यवस्था (9!) होती है। परीक्षा में सभी वस्तुएं अलग हों तो सीधे factorial लगाएं।
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