The number of all possible matrices of order 3 × 3 with each entry 0 or 1 is
Let 
Elements = 9 Order = 3 × 3
Every item in this matrix can be filled in two ways either by 0 or by 1.
Possible Matrices = 2 × 2 × 2 × 2 × 2 × 2 × 2 × 2 × 2
= 512
Option (D) is the answer.
1