If A and B are two matrices of the order 3xm and 3xn, respectively and$m=n$, then order of matrix (5A-2B) is

${\text{A}}_{\text{3xm}}$ and ${\text{B}}_{\text{3xn}}$ are two matrices. If $\text{m}=\text{n}$, then A and B have same orders of $\text{3 x n}$ each, so

the order of (5A-2B) should be same as 3xn.