(5) जोड़ों को एक पंक्ति में ऐसे बैठाना है कि प्रत्येक जोड़ा साथ बैठे। कितनी व्यवस्थाएं होंगी?
(5) couples are to be seated in a row so that each couple sits together. How many arrangements are possible?
Explanation opens after your attempt
B. (3840)
Concept
Treat each couple as one block, giving (5!) block arrangements and (2!) ways inside each block. The total is (5!\cdot(2!)5=3840).
Why this answer is correct
The correct answer is B. (3840). Treat each couple as one block, giving (5!) block arrangements and (2!) ways inside each block. The total is (5!\cdot(2!)5=3840).
Exam Tip
हर जोड़े को एक ब्लॉक मानें, तो (5!) ब्लॉक व्यवस्थाएं और प्रत्येक ब्लॉक में (2!) तरीके हैं। कुल (5!\cdot(2!)5=3840) है।
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