(8) अलग-अलग लोगों को वृत्त में बैठाना है। तीन निश्चित लोग लगातार बैठें, ऐसे कितने वृत्तीय क्रम हैं?
(8) distinct people are to be seated in a circle. How many circular arrangements have three particular people sitting consecutively?
Explanation opens after your attempt
B. (4320)
Concept
Treat the three people as one block; (6) units around a circle give (5!), and the block has (3!) internal orders. Circular blocks reduce the number of units.
Why this answer is correct
The correct answer is B. (4320). Treat the three people as one block; (6) units around a circle give (5!), and the block has (3!) internal orders. Circular blocks reduce the number of units.
Exam Tip
तीन लोगों को एक ब्लॉक मानकर (6) इकाइयों की वृत्तीय व्यवस्था (5!) है और ब्लॉक के अंदर (3!) क्रम हैं। वृत्तीय ब्लॉक में इकाइयों की संख्या घटती है।
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