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Number of necklaces can be formed with 4...

Number of necklaces can be formed with 4 identical beads and two distinct jewels is 'k', then k divides

A

`15`

B

`35`

C

`21`

D

`105`

Text Solution

Verified by Experts

The correct Answer is:
A, C, D
`(1)/(2)((5!)/(4!)+1)=3.`
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