(7) अलग-अलग व्यक्तियों को एक पंक्ति में बैठाना है, पर एक व्यक्ति किसी भी सिरे पर न बैठे। कितनी व्यवस्थाएं होंगी?
(7) distinct persons are to sit in a row, but one particular person must not sit at either end. How many arrangements are possible?
Explanation opens after your attempt
A. (3600)
Concept
The particular person has (5) inner positions and the others sit in (6!) ways. The total is \(5\cdot6!=3600\).
Why this answer is correct
The correct answer is A. (3600). The particular person has (5) inner positions and the others sit in (6!) ways. The total is \(5\cdot6!=3600\).
Exam Tip
विशेष व्यक्ति के लिए (5) अंदरूनी स्थान हैं और बाकी (6!) तरीकों से बैठेंगे। कुल \(5\cdot6!=3600\) है।
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