The advertisement shows the cost of buying markers from a store.
- Tiffany bought 21 markers. How much did she pay?
- Peter bought 100 markers. How much did he pay?
(a)
Number of sets of 15 markers
= 21 ÷ 15
= 1 r 6
Cost of first 15 markers
= 15 x 2.30
= $34.50
Cost of the next 6 markers
= 6 x 1.90
= $11.40
Amount that Tiffany paid
= 34.50 + 11.40
= $45.90
(b)
Number of markers that was not part of the first 15 markers
= 100 - 15
= 85
Cost of first 15 markers = $34.50
Cost of the next 85 markers
= 85 x 1.90
= $161.50
Total cost of 100 markers before an additional discount of 8% is applied
= 34.50 + 161.50
= $196
Amount that Peter paid in percent after an additional discount of 8% is applied
= 100% - 8%
= 92%
100% of the total cost of 100 markers = 196
1% of the total cost of 100 markers = 196 ÷ 100 = 1.96
92% of the total cost of 100 markers = 92 x 1.96 = 180.32
Amount that Peter paid = $180.32
Answer(s): (a) $45.90; (b) $180.32
