Question
If $A=\left[\begin{array}{ll}2 & 5 \\ 3 & 8\end{array}\right]$ then find $A ^{-1}$.
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
| $X = X_i$ | $1$ | $2$ | $3$ | $4$ |
| $P(X = X_i)$ | $c$ | $2c$ | $4c$ | $4c$ |