The advertisement shows the cost of buying notebooks from a bookstore.
- Winnie bought 26 notebooks. How much did she pay?
- Vaidev bought 70 notebooks. How much did he pay?
(a)
Number of sets of 15 notebooks
= 26 ÷ 15
= 1 r 11
Cost of first 15 notebooks
= 15 x 4.70
= $70.50
Cost of the next 11 notebooks
= 11 x 4.30
= $47.30
Amount that Winnie paid
= 70.50 + 47.30
= $117.80
(b)
Number of notebooks that was not part of the first 15 notebooks
= 70 - 15
= 55
Cost of first 15 notebooks = $70.50
Cost of the next 55 notebooks
= 55 x 4.30
= $236.50
Total cost of 70 notebooks before an additional discount of 3% is applied
= 70.50 + 236.50
= $307
Amount that Vaidev paid in percent after an additional discount of 3% is applied
= 100% - 3%
= 97%
100% of the total cost of 70 notebooks = 307
1% of the total cost of 70 notebooks = 307 ÷ 100 = 3.07
97% of the total cost of 70 notebooks = 97 x 3.07 = 297.79
Amount that Vaidev paid = $297.79
Answer(s): (a) $117.80; (b) $297.79
