The number of all possible matrices of order $3×3$ with each entry 2 or 3 is.
Answer & explanation
Correct answer: option 4
Order of matrix $=3\times3$
Total number of entries $=9$
Each entry can be either $2$ or $3$
Number of choices for each entry $=2$
Total possible matrices $=2^9$
$=512$
The number of such matrices is $512$.