Class 11 Mathematics Permutations and Combinations Derivations of formulas and their connections Expert Level 64

(n) distinct beads की bracelet arrangements में (\frac{(n-1)!}{2}) कब सही है?

When is (\frac{(n-1)!}{2}) correct for bracelet arrangements of (n) distinct beads?

Explanation opens after your attempt
Correct Answer

A. जब rotations और reflections दोनों same माने जाएंWhen both rotations and reflections are considered the same

Step 1

Concept

In a bracelet, mirror images are considered the same. In exams divide the circular count by (2) when reflection is the same.

Step 2

Why this answer is correct

The correct answer is A. जब rotations और reflections दोनों same माने जाएं / When both rotations and reflections are considered the same. In a bracelet, mirror images are considered the same. In exams divide the circular count by (2) when reflection is the same.

Step 3

Exam Tip

Bracelet में mirror images same मानी जाती हैं। परीक्षा में reflection same होने पर circular count को (2) से divide करें।

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(n) distinct beads की bracelet arrangements में (\frac{(n-1)!}{2}) कब सही है? / When is (\frac{(n-1)!}{2}) correct for bracelet arrangements of (n) distinct beads?

Correct Answer: A. जब rotations और reflections दोनों same माने जाएं / When both rotations and reflections are considered the same. Explanation: Bracelet में mirror images same मानी जाती हैं। परीक्षा में reflection same होने पर circular count को (2) से divide करें। / In a bracelet, mirror images are considered the same. In exams divide the circular count by (2) when reflection is the same.

Which concept should I revise for this Mathematics MCQ?

In a bracelet, mirror images are considered the same. In exams divide the circular count by (2) when reflection is the same.

What exam hint can help solve this Mathematics question?

Bracelet में mirror images same मानी जाती हैं। परीक्षा में reflection same होने पर circular count को (2) से divide करें।