The cost of 7 notebooks is Rs. 280.
What is the unit cost of a notebook?
In order to determine the unit cost, we would divide 480 by a dozen. A dozen means 12.
Unit cost = Rs 480 / 12 = Rs 40
How Much will 7 note book cost?
Cost of 7 notebooks = unit cost x 7
Rs 40 x 7 = Rs. 280
To learn more about unit rate, please check: https://brainly.com/question/21734785
