Question

Which of the following matrix is of the order 3×4.

(a) A=\(\begin{bmatrix}3&4\\3&5\\4&5\end{bmatrix}\)

(b) A=\(\begin{bmatrix}1&2&3\\5&7&9\end{bmatrix}\)

(c) A=\(\begin{bmatrix}4&5&6 \\5&2&6\\6&4&7\\7&7&1\end{bmatrix}\)

(d) A=\(\begin{bmatrix}1\\4\\6\end{bmatrix}\)

I had been asked this question during an interview.

Asked question is from Matrices in chapter Matrices of Mathematics – Class 12

Answer 1

Correct choice is (c) A=\(\begin{bmatrix}4&5&6 \\5&2&6\\6&4&7\\7&7&1\end{bmatrix}\)

Explanation: The matrix A=\(\begin{bmatrix}4&5&6\\5&2&6\\6&4&7\\7&7&1\end{bmatrix}\) is a 3×4 matrix as it as 3 rows and 4 columns.