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(4) married couples are seated around a circular table. If each couple must sit together, how many arrangements are possible?(4) विवाहित जोड़ों को गोल मेज पर बैठाना है। प्रत्येक जोड़ा साथ बैठे, तो व्यवस्थाओं की संख्या कितनी होगी?
Answer and explanationउत्तर और व्याख्या
Correct answer:सही उत्तर: (384)(384)
Treat each couple as one block; the (4) blocks have ((4-1)!) circular arrangements and each block has (2!) internal orders. Exam tip: count the internal swap of every couple.प्रत्येक जोड़े को एक खंड मानने पर (4) खंडों की गोल व्यवस्था ((4-1)!) और हर खंड के अंदर (2!) तरीके हैं। परीक्षा में हर couple के internal swap को अलग गिनें।
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