PSLE A store is having a book sale.
The 1st book is at 15% discount.
The 2nd book is at 40% discount.
The price of the 2nd book should be equal or lower than the price of the 1st book.
Nicole and Carl each bought two books at the sale.
- Nicole's books were priced at $6 and $17. How much did she pay for them?
- Carl paid a total of $39.30 for his two books. He paid $11.70 more for the 1st book than the 2nd book. What was the price of the 2nd book before discount?
|
1st book |
2nd book |
Total amount |
Original price
|
100% $17 |
100% $6 |
|
Discount |
- 15% |
- 40% |
|
Sale price |
85% |
60% |
? |
(a)
Selling price of the 1st book
= 85% x 17
=
85100 x 17
= $14.45
Selling price of 2nd book
= 60% x 6
=
60100 x 6
= $3.60
Total amount that Nicole paid
= 14.45 + 3.60
= $18.05
|
1st book |
2nd book |
Total amount |
Original price |
100% |
100% |
|
Discount |
- 15% |
- 40% |
|
Sale price |
85%
|
60%
|
|
Compare 1st book and 2nd book |
1 u + $11.70 |
1 u |
$39.30 |
(b)
Sale price of the 1st book = 1 u + 11.70
Sale price of the 2nd book = 1 u
Total amount that Carl paid
= 1 u + 11.70 + 1 u
= 2 u + 11.70
2 u + 11.70 = 39.30
2 u = 39.30 - 11.70
2 u = 27.60
1 u = 27.60 ÷ 2 = 13.80
Sale price of the 2nd book = $13.80
60% of the price = $13.80
100% of the price =
13.8060 x 100 = $23
Selling price of the 2nd book before discount = $23
Answer(s): (a) $18.05; (b) $23