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In a row of (8) people, how many arrangements have at least (3) people between (A) and (B)?(8) व्यक्तियों की पंक्ति में (A) और (B) के बीच कम से कम (3) व्यक्ति हों, ऐसी कितनी व्यवस्थाएं हैं?
Answer and explanationउत्तर और व्याख्या
Correct answer:सही उत्तर: (14400)(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.(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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