Question

Find the number of all possible matrices of order $3\times 3$ with each entry $0$ or $1$?

Answer 1

Find the number of all possible matrices of order $3\times 3$ with each

entry 0 or 1 is ?

There are 9 elements in $3\times 3$ matrix and one element

can be filled in two ways either 0 or 1.

Total possible matrices $=2^9=512.$