How many necklace of 12 beads each can be made from 18 beads of different colours?  Choose the correct choice from the following answers.
A) 18!(6 x 29)	B) 18!(6 x 21)	C) 18!(6 x 24)	D) 18!(6 x 22)	E) 18!(6 x 44)
Explanation:   Here clock-wise and anti-clockwise arrangements are same.   Hence total number of circular–permutations: \inline {\color{Black} \frac{18P_{12}}{2\times 12}} = \inline {\color{Black} \frac{18!}{6\times 24}}   Answer: 18!(6 x 24)) 18!(6 x 24)
<result>C</result>
How many necklace of 12 beads each can be made from 18 beads of different colours?