If A and B are two matrices of order 3 × p and 3 ×q respectively, and p=q, then the order of (2A-5B) is :
Answer & explanation
Correct answer: option 1
The correct answer is option (1) → $3×q$
for $3 × q$, $3 ×p$ if $p=q$
$⇒3 × q=3 ×p$
so order (2A - 5B) = order (A) = order (B)
$=3 × q=3 ×p$