no. of non singular matrices

[jacks]

The no. of $3 \times 3$ non - singular matrices matrices, with four entries as $1$ and all other entries as $0$

 

[Mr Fantastic]

The no. of $3 \times 3$ non - singular matrices matrices, with four entries as $1$ and all other entries as $0$

I assume the question is "Find the number of ....", in which case I suggest you count the number of ways you can make a singular matrix and then subtract this from the total number of all possible matrices.