Find the Inverse of the Matrix $$\left[ \begin{array} { r r } 3 & 0 \\1 & - 1\end{array} \right]$$

Multiple Choice

Find the inverse of the matrix.
- $$\left[ \begin{array} { r r } 3 & 0 \\1 & - 1\end{array} \right]$$

A) $\left[ \begin{array} { c c } - 1 & 0 \\ \frac { 1 } { 3 } & \frac { 1 } { 3 } \end{array} \right]$
B) $\left[ \begin{array} { c c } \frac { 1 } { 3 } & 0 \\ - \frac { 1 } { 3 } & - 1 \end{array} \right]$
C) $\left[ \begin{array} { c c } \frac { 1 } { 3 } & 0 \\ \frac { 1 } { 3 } & - 1 \end{array} \right]$
D) No inverse