Question

If A is a 2*3 matrix and B is a 3*4 matrix, how many columns does AB have
(1) 3 (2) 4 (3) 2 (4) 5

Answer 1

Answer:

AB has four (4) columns

Answer 2

Answer:

Matrix AB has 4 columns.

Step-by-step explanation:

Matrix A = 2 * 3 matrix

Matrix B = 3 * 4 matrix

Matrix AB = (number of rows of Matrix A) * (number of columns of Matrix B) = 2 * 4

Matrix = m * n = rows * columns.

Therefore, matrix AB has 4 columns.