Answer: 4.
- A 2
- B 4
- C 6
- D 8
Correct answer: B. 4
Explanation: A x B has |A| x |B| = 2 x 2 = 4 elements: {(1,a),(1,b),(2,a),(2,b)}.
Concept context
Ordered pairs, Cartesian products, types of relations and functions, domain and range. Foundation for calculus and Class 12 algebra.