Practicing Success

Target Exam

CUET

Subject

-- Mathematics - Section A

Chapter

Determinants

Question:

If $A$ and $B$ are two matrices of order $4 \times m$ and $4 \times n$, respectively and $m=n$ then the order of matrix $(5 A-2 B)$ is :

Options:

$4 \times m$

$4 \times 4$

$3 \times 3$

$m \times 4$

Correct Answer:

$4 \times m$

Explanation:

given m = n

A → order 4 × m 

B → order 4 × n

for addition of two matrix / subtraction their orders must be same

So order (SA - ZB) = 4 × m