The advertisement shows the cost of buying pens from a stationery kiosk.
- Fanny bought 24 pens. How much did she pay?
- Warren bought 50 pens. How much did he pay?
(a)
Number of sets of 15 pens
= 24 ÷ 15
= 1 r 9
Cost of first 15 pens
= 15 x 4.90
= $73.50
Cost of the next 9 pens
= 9 x 4.70
= $42.30
Amount that Fanny paid
= 73.50 + 42.30
= $115.80
(b)
Number of pens that was not part of the first 15 pens
= 50 - 15
= 35
Cost of first 15 pens = $73.50
Cost of the next 35 pens
= 35 x 4.70
= $164.50
Total cost of 50 pens before an additional discount of 3% is applied
= 73.50 + 164.50
= $238
Amount that Warren paid in percent after an additional discount of 3% is applied
= 100% - 3%
= 97%
100% of the total cost of 50 pens = 238
1% of the total cost of 50 pens = 238 ÷ 100 = 2.38
97% of the total cost of 50 pens = 97 x 2.38 = 230.86
Amount that Warren paid = $230.86
Answer(s): (a) $115.80; (b) $230.86
