PSLE A store is having a book sale.
The 1st book is at 5% discount.
The 2nd book is at 25% discount.
The price of the 2nd book should be equal or lower than the price of the 1st book.
Barbara and Flynn each bought two books at the sale.
- Barbara's books were priced at $9 and $19. How much did she pay for them?
- Flynn paid a total of $46.70 for his two books. He paid $12.20 less for the 2nd book than the 1st book. What was the price of the 2nd book before discount?
|
1st book |
2nd book |
Total amount |
Original price
|
100% $19 |
100% $9 |
|
Discount |
- 5% |
- 25% |
|
Sale price |
95% |
75% |
? |
(a)
Selling price of the 1st book
= 95% x 19
=
95100 x 19
= $18.05
Selling price of 2nd book
= 75% x 9
=
75100 x 9
= $6.75
Total amount that Barbara paid
= 18.05 + 6.75
= $24.80
|
1st book |
2nd book |
Total amount |
Original price |
100% |
100% |
|
Discount |
- 5% |
- 25% |
|
Sale price |
95%
|
75%
|
|
Compare 1st book and 2nd book |
1 u + $12.20 |
1 u |
$46.70 |
(b)
Sale price of the 1st book = 1 u + 12.20
Sale price of the 2nd book = 1 u
Total amount that Flynn paid
= 1 u + 12.20 + 1 u
= 2 u + 12.20
2 u + 12.20 = 46.70
2 u = 46.70 - 12.20
2 u = 34.50
1 u = 34.50 ÷ 2 = 17.25
Sale price of the 2nd book = $17.25
75% of the price = $17.25
100% of the price =
17.2575 x 100 = $23
Selling price of the 2nd book before discount = $23
Answer(s): (a) $24.80; (b) $23