(10) distinct beads की necklace arrangements में rotations same लेकिन reflections different हों, तो count क्या है?
For necklace arrangements of (10) distinct beads where rotations are the same but reflections are different, what is the count?
Explanation opens after your attempt
Correct Answer
A. (9!)
Concept
Only rotations are duplicates, so the circular count is ((10-1)!). In exams divide by (2) only after reading the reflection condition.
Why this answer is correct
The correct answer is A. (9!). Only rotations are duplicates, so the circular count is ((10-1)!). In exams divide by (2) only after reading the reflection condition.
Exam Tip
केवल rotations duplicate हैं इसलिए circular count ((10-1)!) है। परीक्षा में reflection condition पढ़कर ही (2) से divide करें।
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