Answer: 3×4=12.
- A 3+4=7
- B 3×4=12
- C 3-4=?
- D 3<sup>4</sup>=81
Correct answer: B. 3×4=12
Explanation: Multiplication principle: 3 × 4 = 12. When choices are independent and both must be made.
Counting tree for selecting 2 items from {A, B, C} without repetition: 3 x 2 = 6 ordered arrangements.
Concept context
Counting, arrangements, and selections