Answer: 120.
- A 25
- B 100
- C 120
- D 720
Correct answer: C. 120
Explanation: 5! = 5×4×3×2×1 = 120.
Counting tree for selecting 2 items from {A, B, C} without repetition: 3 x 2 = 6 ordered arrangements.
Concept context
Counting, arrangements, and selections