A.14 Circular Combination

  1. Arrange 8 dancers in circular fashion.
  2. Use 8 pearls in a band to make a necklace.
  3. Arrange 8 science and 7 arts students circularly so no two arts students are together.
  • 7!
  • \(\frac{(8-1)!}{2}\)
  • \(^8P_7 \times \space 7!\)