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Q.
The number of ways that 8 beads of different colours be string as a necklace is
A.
2520
B.
2880
C.
5040
D.
4320
E.
None of the above
View Answer
Correct choice: A
Explanation:
8 different beads can be arranged in circular form in (8 – 1)! = 7! ways. Since there is no distinction betweenthe clockwise and anticlockwise arrangement. So the required number of arrangements = 7!/2=2520.
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