The number of all possible matrices of order 2 × 2 with each entry 0 or 1 is :
Answer & explanation
Correct answer: option 3
Order = 2 × 2
⇒ No. of cells = 4
each cell has two possibilities ("0" or "1")
So no. of possible matrices = $\underbrace{2 \times 2 \times 2 \times 2}_{4 \text { times }}=24=16$