The advertisement shows the cost of buying notebooks from a stationery kiosk.
- Vanessa bought 29 notebooks. How much did she pay?
- Ivan bought 60 notebooks. How much did he pay?
(a)
Number of sets of 15 notebooks
= 29 ÷ 15
= 1 r 14
Cost of first 15 notebooks
= 15 x 3.50
= $52.50
Cost of the next 14 notebooks
= 14 x 3.30
= $46.20
Amount that Vanessa paid
= 52.50 + 46.20
= $98.70
(b)
Number of notebooks that was not part of the first 15 notebooks
= 60 - 15
= 45
Cost of first 15 notebooks = $52.50
Cost of the next 45 notebooks
= 45 x 3.30
= $148.50
Total cost of 60 notebooks before an additional discount of 9% is applied
= 52.50 + 148.50
= $201
Amount that Ivan paid in percent after an additional discount of 9% is applied
= 100% - 9%
= 91%
100% of the total cost of 60 notebooks = 201
1% of the total cost of 60 notebooks = 201 ÷ 100 = 2.01
91% of the total cost of 60 notebooks = 91 x 2.01 = 182.91
Amount that Ivan paid = $182.91
Answer(s): (a) $98.70; (b) $182.91
