यदि (n) distinct objects को (a,a,b) आकार के unlabelled groups में बांटा जाए और (2a+b=n), तो extra division किससे होगा?
If (n) distinct objects are divided into unlabelled groups of sizes (a,a,b) and (2a+b=n), what is the extra division?
Explanation opens after your attempt
C. (2!)
Concept
Two groups have the same size (a), so interchanging them gives duplicates. In exams divide extra by factorial for equal-size unlabelled groups.
Why this answer is correct
The correct answer is C. (2!). Two groups have the same size (a), so interchanging them gives duplicates. In exams divide extra by factorial for equal-size unlabelled groups.
Exam Tip
दो groups का size (a) समान है इसलिए उनकी अदला-बदली duplicate देती है। परीक्षा में equal-size unlabelled groups पर extra factorial divide करें।
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