यदि (n) objects को (3) labelled groups में sizes (a), (b), (c) में बाँटना हो, तो formula कौन-सा है?
If (n) objects are divided into (3) labelled groups of sizes (a), (b), (c), which formula is correct?
Explanation opens after your attempt
A. \(\frac{n!}{a!b!c!}\)
Concept
Order inside each labelled group is irrelevant, so divide by (a!b!c!). In exams do not divide extra among labelled groups themselves.
Why this answer is correct
The correct answer is A. \(\frac{n!}{a!b!c!}\). Order inside each labelled group is irrelevant, so divide by (a!b!c!). In exams do not divide extra among labelled groups themselves.
Exam Tip
हर labelled group के अंदर order महत्वहीन है इसलिए (a!b!c!) से भाग दिया जाता है। परीक्षा में labelled groups को आपस में extra divide न करें।
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