यदि (n) objects को (2) equal unlabelled groups में बाँटना हो तो \(^{n}C_{n/2}\) के बाद किससे भाग देना होगा?
If (n) objects are divided into (2) equal unlabelled groups, by what should \(^{n}C_{n/2}\) be divided?
Explanation opens after your attempt
Correct Answer
A. (2!)
Concept
The two equal groups are unlabelled, so interchanging the groups counts twice. In exams apply the extra (2!) correction for equal unlabelled groups.
Why this answer is correct
The correct answer is A. (2!). The two equal groups are unlabelled, so interchanging the groups counts twice. In exams apply the extra (2!) correction for equal unlabelled groups.
Exam Tip
दो equal groups unlabelled हैं इसलिए group interchange दो बार गिनता है। परीक्षा में equal unlabelled groups पर extra (2!) correction लगाएँ।
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