The advertisement shows the cost of buying pencils from a store.
- Cindy bought 24 pencils. How much did she pay?
- Daniel bought 50 pencils. How much did he pay?
(a)
Number of sets of 15 pencils
= 24 ÷ 15
= 1 r 9
Cost of first 15 pencils
= 15 x 2.50
= $37.50
Cost of the next 9 pencils
= 9 x 2.30
= $20.70
Amount that Cindy paid
= 37.50 + 20.70
= $58.20
(b)
Number of pencils that was not part of the first 15 pencils
= 50 - 15
= 35
Cost of first 15 pencils = $37.50
Cost of the next 35 pencils
= 35 x 2.30
= $80.50
Total cost of 50 pencils before an additional discount of 6% is applied
= 37.50 + 80.50
= $118
Amount that Daniel paid in percent after an additional discount of 6% is applied
= 100% - 6%
= 94%
100% of the total cost of 50 pencils = 118
1% of the total cost of 50 pencils = 118 ÷ 100 = 1.18
94% of the total cost of 50 pencils = 94 x 1.18 = 110.92
Amount that Daniel paid = $110.92
Answer(s): (a) $58.20; (b) $110.92