PSLE A stationery kiosk is having a book sale.
The 1st book is at 5% discount.
The 2nd book is at 35% discount.
The price of the 2nd book should be equal or lower than the price of the 1st book.
Roshel and Eric each bought two books at the sale.
- Roshel's books were priced at $11 and $17. How much did she pay for them?
- Eric paid a total of $39.65 for his two books. He paid $9.75 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% $17 |
100% $11 |
|
Discount |
- 5% |
- 35% |
|
Sale price |
95% |
65% |
? |
(a)
Selling price of the 1st book
= 95% x 17
=
95100 x 17
= $16.15
Selling price of 2nd book
= 65% x 11
=
65100 x 11
= $7.15
Total amount that Roshel paid
= 16.15 + 7.15
= $23.30
|
1st book |
2nd book |
Total amount |
Original price |
100% |
100% |
|
Discount |
- 5% |
- 35% |
|
Sale price |
95%
|
65%
|
|
Compare 1st book and 2nd book |
1 u + $9.75 |
1 u |
$39.65 |
(b)
Sale price of the 1st book = 1 u + 9.75
Sale price of the 2nd book = 1 u
Total amount that Eric paid
= 1 u + 9.75 + 1 u
= 2 u + 9.75
2 u + 9.75 = 39.65
2 u = 39.65 - 9.75
2 u = 29.90
1 u = 29.90 ÷ 2 = 14.95
Sale price of the 2nd book = $14.95
65% of the price = $14.95
100% of the price =
14.9565 x 100 = $23
Selling price of the 2nd book before discount = $23
Answer(s): (a) $23.30; (b) $23