(8) पुस्तकों को शेल्फ पर रखना है। दो विशेष पुस्तकें दोनों सिरों पर हों तो व्यवस्थाएं कितनी होंगी?
(8) books are to be arranged on a shelf. How many arrangements are possible if two particular books occupy the two ends?
Explanation opens after your attempt
A. (1440)
Concept
The two particular books occupy the ends in (2!) ways and the remaining books in (6!) ways. The total is \(2!\cdot6!=1440\).
Why this answer is correct
The correct answer is A. (1440). The two particular books occupy the ends in (2!) ways and the remaining books in (6!) ways. The total is \(2!\cdot6!=1440\).
Exam Tip
दो विशेष पुस्तकें सिरों पर (2!) तरीकों से और शेष (6!) तरीकों से रखी जाएंगी। कुल \(2!\cdot6!=1440\) है।
Login to save your score, XP, coins and progress.
