Q92 / 180 · KCET 2025 · Mathematics
If $A$ is a square matrix of order $3 \times 3, \operatorname{det} A=3$, then the value of $\operatorname{det}\left(3 A^{-1}\right)$ is
- A$\frac{1}{3}$
- B$3$
- C$27$
- Correct answerD$9$
Solution
$\left|3 \mathrm{~A}^{-1}\right|=3^3 \frac{1}{3}=9$
Hence, the correct answer is option: 'D'.