Answer: 4!.
- A 5!
- B 4!
- C 10
- D 24
Correct answer: B. 4!
Explanation: Circular permutations of n objects = (n-1)! = 4! = 24.
Counting tree for selecting 2 items from {A, B, C} without repetition: 3 x 2 = 6 ordered arrangements.
Concept context
Counting, arrangements, and selections