(8) distinct beads की necklace में reflection same हो, तो count कौन-सा है?
What is the count for a necklace of (8) distinct beads when reflection is considered same?
Explanation opens after your attempt
B. \(\frac{7!}{2}\)
Concept
First removing rotations gives (7!), then mirror images being the same makes us divide by (2). In exams always check reflection in necklace problems.
Why this answer is correct
The correct answer is B. \(\frac{7!}{2}\). First removing rotations gives (7!), then mirror images being the same makes us divide by (2). In exams always check reflection in necklace problems.
Exam Tip
पहले rotations हटाकर (7!) मिलता है, फिर mirror images same होने से (2) से भाग देते हैं। परीक्षा में necklace में reflection जरूर जाँचें।
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