Question

Choose the correct option:

Multiplication of $5$ and $\left[\begin{array}{cc}3& 5\\ 2& 8\end{array}\right]$ is

• A. $\left[\begin{array}{cc}15& 25\\ 10& 40\end{array}\right]$
• B. $\left[\begin{array}{cc}3& 5\\ 2& 24\end{array}\right]$
• C. $\left[\begin{array}{cc}15& 25\\ 6& 24\end{array}\right]$
• D. None of the above

Answer 1

The correct option is A $\left[\begin{array}{cc}15& 25\\ 10& 40\end{array}\right]$

Given matrix $\left[\begin{array}{cc}3& 5\\ 2& 8\end{array}\right]$

Now, $5\times \left[\begin{array}{cc}3& 5\\ 2& 8\end{array}\right]=$ $\left[\begin{array}{cc}15& 25\\ 10& 40\end{array}\right]$

$\therefore$ Option A is correct