The number of ways in which 8 different pearls can be arranged to from a necklace is

The number of ways in which 8 different pearls can be arranged to from a necklace is
  1. 40320
  2. 5040
  3. 2520
  4. 1260

Solution

Number of necklaces formed from 8 different pearls $=\frac{(8-1) !}{2}=7 \times 6 \times 5 \times 4 \times 3=2520$

Asked in: MHT CET 2021 (21 Sep Shift 1)

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