Find the number of ways in which 7 different beads can be arranged to form a necklace.  Choose the correct choice from the following answers:	A) 30	B) 20	C) 420	D) 60	E) 80
Since in forming a necklace clockwise and anticlockwise arrangements are not different, therefore,7 beads can be arranged to form a necklace in(7-1)! /2ways   = 6*5*4*3*2/2 = 420 ways   Answer is 420
<result>C</result>
Find the number of ways in which 7 different beads can be arranged to form a necklace.