Find the number of ways in which 10 different beads can be arranged to form a necklace.  Choose the correct choice from the following options:
A) 181440
B) 245890
C) 457890
D) 124560
E) 231560
Since in forming a necklace clockwise and anticlockwise arrangements are not different, therefore,10 beads can be arranged to form a necklace in(10-1)! /2 ways   = 9!/2 = 181440ways   181440nswer is 181440
<result>A</result>
Find the number of ways in which 10 different beads can be arranged to form a necklace.