Answer: 24.
- A 4
- B 12
- C 24
- D 16
Correct answer: C. 24
Explanation: 4P4 = 4! = 24. All 4 books can be arranged in 4! = 24 ways.
Counting tree for selecting 2 items from {A, B, C} without repetition: 3 x 2 = 6 ordered arrangements.
Concept context
Counting, arrangements, and selections