Question:
What is the total number of $2 \times 2$ matrices with each entry 0 or $1 ?$
Solution:
In a $2 \times 2$ matrix, the total number of elements are 4 and each entry can be written in 2 ways.
Number of ways in which 4 entries can be written $=4^{2}=16$ [Applying the above property]
Click here to get exam-ready with eSaral
For making your preparation journey smoother of JEE, NEET and Class 8 to 10, grab our app now.