(6) अलग-अलग किताबों को एक शेल्फ पर रखना है, पर दो विशेष किताबें दोनों सिरों पर हों। कितनी व्यवस्थाएं संभव हैं?
(6) distinct books are to be arranged on a shelf, but two particular books must occupy the two ends. How many arrangements are possible?
Explanation opens after your attempt
Correct Answer
A. (48)
Concept
The two particular books occupy the ends in (2!) ways and the remaining books in (4!) ways. The total is \(2!\cdot4!=48\).
Why this answer is correct
The correct answer is A. (48). The two particular books occupy the ends in (2!) ways and the remaining books in (4!) ways. The total is \(2!\cdot4!=48\).
Exam Tip
दो विशेष किताबें सिरों पर (2!) तरीकों से और बाकी (4!) तरीकों से रखी जाएंगी। कुल \(2!\cdot4!=48\) है।
Login to save your score, XP, coins and progress.