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In how many ways can (5) distinct persons be placed one each in (5) distinct rooms?(5) अलग-अलग व्यक्तियों को (5) अलग-अलग कमरों में एक-एक करके कितने तरीकों से रखा जा सकता है?
Answer and explanationउत्तर और व्याख्या
Correct answer:सही उत्तर: (120)(120)
This is a one-to-one arrangement of (5) persons and (5) rooms, so (5!=120). In exams, assignments to distinct rooms are permutations.यह (5) व्यक्तियों और (5) कमरों की एक-एक व्यवस्था है, इसलिए (5!=120)। परीक्षा में distinct rooms हों तो assignment भी permutation है।
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