Answer: 16.
- A 4
- B 8
- C 16
- D 24
Correct answer: C. 16
Explanation: Total subsets = 2<sup>n</sup> = 2<sup>4</sup> = 16 (including empty set and the set itself).
Counting tree for selecting 2 items from {A, B, C} without repetition: 3 x 2 = 6 ordered arrangements.
Concept context
Counting, arrangements, and selections