(8) विद्यार्थियों को एक पंक्ति में बैठाना है, पर दो विशेष विद्यार्थी साथ न बैठें। कितनी व्यवस्थाएं होंगी?
(8) students are to be seated in a row, but two particular students must not sit together. How many arrangements are possible?
Explanation opens after your attempt
A. (30240)
Concept
Subtract the together arrangements \(7!\cdot2!\) from total (8!). The answer is (40320-10080=30240).
Why this answer is correct
The correct answer is A. (30240). Subtract the together arrangements \(7!\cdot2!\) from total (8!). The answer is (40320-10080=30240).
Exam Tip
कुल (8!) से साथ बैठने वाली \(7!\cdot2!\) व्यवस्थाएं घटाएं। उत्तर (40320-10080=30240) है।
Login to save your score, XP, coins and progress.
