यदि (A) और (B) round table पर adjacent हों, तो (n) people के लिए block method count क्या होगा?
If (A) and (B) are adjacent at a round table, what is the block method count for (n) people?
Explanation opens after your attempt
Correct Answer
A. (2!(n-2)!)
Concept
Treating (A) and (B) as one block gives (n-1) circular objects. In exams remember ((n-2)!) in circular block counts.
Why this answer is correct
The correct answer is A. (2!(n-2)!). Treating (A) and (B) as one block gives (n-1) circular objects. In exams remember ((n-2)!) in circular block counts.
Exam Tip
(A) और (B) को one block मानने पर circular objects (n-1) होते हैं। परीक्षा में circular block count में ((n-2)!) याद रखें।
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