JEE MATHEMATICS MCQ: PERMUTATIONS

1 Easy

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Find the number of chains that can be prepared using 5 different colored beads

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Correct option: D

\frac{1}{2} \times 4

Option D (

\frac{1}{2} \times 4

!) is correct because the number of ways to arrange n distinct objects in a circle is (n-1)!, and for a chain, we divide by 2 to account for flipping it over.

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