(6) अलग-अलग व्यक्तियों को (8) अलग-अलग कुर्सियों पर बैठाना है। दो विशेष कुर्सियां खाली रहें, तो कितनी व्यवस्थाएं होंगी?
(6) distinct persons are to be seated on (8) distinct chairs. If two particular chairs must remain empty, how many arrangements are possible?
Explanation opens after your attempt
A. (720)
Concept
The two empty chairs are fixed, so seat (6) persons on the remaining (6) chairs in (6!) ways. The answer is (720).
Why this answer is correct
The correct answer is A. (720). The two empty chairs are fixed, so seat (6) persons on the remaining (6) chairs in (6!) ways. The answer is (720).
Exam Tip
दो कुर्सियां खाली निश्चित हैं, इसलिए (6) व्यक्तियों को बाकी (6) कुर्सियों पर (6!) तरीकों से बैठाएं। उत्तर (720) है।
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