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In how many ways can (9) distinct pens be arranged in a row?(9) अलग-अलग पेनों को एक पंक्ति में कितने तरीकों से रखा जा सकता है?
Answer and explanationउत्तर और व्याख्या
Correct answer:सही उत्तर: (362880)(362880)
The arrangement of (9) distinct objects is (9!). In exams, use factorial directly when all objects are distinct.अलग-अलग (9) वस्तुओं की व्यवस्था (9!) होती है। परीक्षा में सभी वस्तुएं अलग हों तो सीधे factorial लगाएं।
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