(5) लड़के और (5) लड़कियां एक पंक्ति में बारी-बारी से कितने तरीकों से बैठ सकते हैं?
In how many ways can (5) boys and (5) girls sit alternately in a row?
Explanation opens after your attempt
A. (28800)
Concept
There are two possible patterns, and in each pattern boys arrange in (5!) ways and girls in (5!) ways. With equal numbers, alternate seating has two starts.
Why this answer is correct
The correct answer is A. (28800). There are two possible patterns, and in each pattern boys arrange in (5!) ways and girls in (5!) ways. With equal numbers, alternate seating has two starts.
Exam Tip
दो पैटर्न संभव हैं और प्रत्येक में लड़के (5!) तथा लड़कियां (5!) तरीकों से बैठते हैं। बराबर संख्या में वैकल्पिक बैठाने पर दो शुरुआतें होती हैं।
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