(8) व्यक्तियों की पंक्ति में (C) किसी एक सिरे पर हो और (A) तथा (B) के बीच ठीक (2) व्यक्ति हों, ऐसी कितनी व्यवस्थाएं हैं?
In a row of (8) people, how many arrangements have (C) at one end and exactly (2) people between (A) and (B)?
Explanation opens after your attempt
B. (1920)
Concept
There are (2) ends for (C), and for each, (8) ordered position pairs for (A,B), followed by (5!) arrangements. Fix the end and distance first.
Why this answer is correct
The correct answer is B. (1920). There are (2) ends for (C), and for each, (8) ordered position pairs for (A,B), followed by (5!) arrangements. Fix the end and distance first.
Exam Tip
(C) के लिए (2) सिरे हैं और प्रत्येक में (A,B) के (8) क्रमित स्थान-जोड़े मिलते हैं, फिर बाकी (5!) तरीके हैं। पहले सिरे और दूरी तय करें।
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