The advertisement shows the cost of buying pencils from a shop.
- Raeann bought 22 pencils. How much did she pay?
- Gabriel bought 50 pencils. How much did he pay?
(a)
Number of sets of 15 pencils
= 22 ÷ 15
= 1 r 7
Cost of first 15 pencils
= 15 x 2.30
= $34.50
Cost of the next 7 pencils
= 7 x 1.90
= $13.30
Amount that Raeann paid
= 34.50 + 13.30
= $47.80
(b)
Number of pencils that was not part of the first 15 pencils
= 50 - 15
= 35
Cost of first 15 pencils = $34.50
Cost of the next 35 pencils
= 35 x 1.90
= $66.50
Total cost of 50 pencils before an additional discount of 6% is applied
= 34.50 + 66.50
= $101
Amount that Gabriel paid in percent after an additional discount of 6% is applied
= 100% - 6%
= 94%
100% of the total cost of 50 pencils = 101
1% of the total cost of 50 pencils = 101 ÷ 100 = 1.01
94% of the total cost of 50 pencils = 94 x 1.01 = 94.94
Amount that Gabriel paid = $94.94
Answer(s): (a) $47.80; (b) $94.94