Definition Of Matrix

A matrix is a set of variables or constants arranged in rows and columns in a rectangular or square array.

Examples of Matrix

The following is a matrix with 2 rows and 3 columns
.
The following is a matrix with 2 rows and 2 columns. It's a square matrix as it has the same number of rows and columns. 

Video Examples: Multiplying Matrices - Example 1

Solved Example on Matrix

Ques: The total cost of production and revenue of a XYZ company for the three months are shown by matrices. Identify the matrix that shows the profit.

Choices:

A. 
B. 
C. 
D. 
Correct Answer: A

Solution:

Step 1: Profit is the difference of revenue and cost of production. Step 2: Profit = 

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