(8) व्यक्तियों की पंक्ति में (A) और (B) के बीच कम से कम (3) व्यक्ति हों, ऐसी कितनी व्यवस्थाएं हैं?
In a row of (8) people, how many arrangements have at least (3) people between (A) and (B)?
Explanation opens after your attempt
B. (14400)
Concept
The positions of (A,B) must differ by at least (4), giving (10) position pairs and (2) orders. The remaining (6!) people are arranged afterward.
Why this answer is correct
The correct answer is B. (14400). The positions of (A,B) must differ by at least (4), giving (10) position pairs and (2) orders. The remaining (6!) people are arranged afterward.
Exam Tip
(A,B) के स्थानों की दूरी कम से कम (4) होनी चाहिए, ऐसे (10) स्थान-जोड़े हैं और क्रम (2) तरीके से होगा। बाकी (6!) लोग व्यवस्थित होंगे।
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