PSLE A store is having a book sale.
The 1st book is at 5% discount.
The 2nd book is at 15% discount.
The price of the 2nd book should be equal or lower than the price of the 1st book.
Lynn and Vaidev each bought two books at the sale.
- Lynn's books were priced at $14 and $22. How much did she pay for them?
- Vaidev paid a total of $52.50 for his two books. He paid $8.30 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% $22 |
100% $14 |
|
Discount |
- 5% |
- 15% |
|
Sale price |
95% |
85% |
? |
(a)
Selling price of the 1st book
= 95% x 22
=
95100 x 22
= $20.90
Selling price of 2nd book
= 85% x 14
=
85100 x 14
= $11.90
Total amount that Lynn paid
= 20.90 + 11.90
= $32.80
|
1st book |
2nd book |
Total amount |
Original price |
100% |
100% |
|
Discount |
- 5% |
- 15% |
|
Sale price |
95%
|
85%
|
|
Compare 1st book and 2nd book |
1 u + $8.30 |
1 u |
$52.50 |
(b)
Sale price of the 1st book = 1 u + 8.30
Sale price of the 2nd book = 1 u
Total amount that Vaidev paid
= 1 u + 8.30 + 1 u
= 2 u + 8.30
2 u + 8.30 = 52.50
2 u = 52.50 - 8.30
2 u = 44.20
1 u = 44.20 ÷ 2 = 22.10
Sale price of the 2nd book = $22.10
85% of the price = $22.10
100% of the price =
22.1085 x 100 = $26
Selling price of the 2nd book before discount = $26
Answer(s): (a) $32.80; (b) $26