PSLE A book shop 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.
Min and Charlie each bought two books at the sale.
- Min's books were priced at $33 and $37. How much did she pay for them?
- Charlie paid a total of $34.60 for his two books. He paid $9.10 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% $37 |
100% $33 |
|
Discount |
- 5% |
- 25% |
|
Sale price |
95% |
75% |
? |
(a)
Selling price of the 1st book
= 95% x 37
=
95100 x 37
= $35.15
Selling price of 2nd book
= 75% x 33
=
75100 x 33
= $24.75
Total amount that Min paid
= 35.15 + 24.75
= $59.90
|
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 + $9.10 |
1 u |
$34.60 |
(b)
Sale price of the 1st book = 1 u + 9.10
Sale price of the 2nd book = 1 u
Total amount that Charlie paid
= 1 u + 9.10 + 1 u
= 2 u + 9.10
2 u + 9.10 = 34.60
2 u = 34.60 - 9.10
2 u = 25.50
1 u = 25.50 ÷ 2 = 12.75
Sale price of the 2nd book = $12.75
75% of the price = $12.75
100% of the price =
12.7575 x 100 = $17
Selling price of the 2nd book before discount = $17
Answer(s): (a) $59.90; (b) $17