Answer: 60.
- A 10
- B 15
- C 60
- D 120
Correct answer: C. 60
Explanation: 5P3 = 5!/(5-3)! = 5×4×3 = 60.
Counting tree for selecting 2 items from {A, B, C} without repetition: 3 x 2 = 6 ordered arrangements.
Concept context
Counting, arrangements, and selections