यदि (10) letters में (4) letters एक जैसे और (3) letters दूसरे प्रकार के एक जैसे हों, तो arrangements formula कौन-सा है?
If among (10) letters (4) letters are identical of one type and (3) letters are identical of another type, which is the arrangement formula?
Explanation opens after your attempt
Correct Answer
B. \(\frac{10!}{4!3!}\)
Concept
Internal orders of two identical groups are not different, so divide by (4!3!). In exams multiply the factorials in the denominator.
Why this answer is correct
The correct answer is B. \(\frac{10!}{4!3!}\). Internal orders of two identical groups are not different, so divide by (4!3!). In exams multiply the factorials in the denominator.
Exam Tip
दो identical groups के internal orders अलग नहीं दिखते इसलिए (4!3!) से भाग देते हैं। परीक्षा में factorial denominator को multiply करें।
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