Answer: mn.
- A m + n
- B m - n
- C m / n
- D mn
Correct answer: D. mn
Explanation: Total number of elements = m x n (rows times columns). A 3x4 matrix has 12 elements.
Element aij of matrix A sits at the intersection of row i and column j.
Concept context
Matrix operations, determinants, inverses, and solving linear systems