(2n) people में (n) men और (n) women हैं। Round table पर alternate seating की count कौन-सी है?
There are (n) men and (n) women among (2n) people. What is the count of alternate seating around a round table?
Explanation opens after your attempt
A. (n!(n-1)!)
Concept
First seat men in a circle in ((n-1)!) ways, then place women in gaps in (n!) ways. In exams fix one group first for circular alternation.
Why this answer is correct
The correct answer is A. (n!(n-1)!). First seat men in a circle in ((n-1)!) ways, then place women in gaps in (n!) ways. In exams fix one group first for circular alternation.
Exam Tip
पहले men को circle में ((n-1)!) ways से बैठाएं, फिर gaps में women को (n!) ways से रखें। परीक्षा में circular alternate में पहले एक group fix करें।
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