PSLE A store is having a book sale.
The 1st book is at 5% discount.
The 2nd book is at 30% discount.
The price of the 2nd book should be equal or lower than the price of the 1st book.
Abi and Ahmad each bought two books at the sale.
- Abi's books were priced at $19 and $21. How much did she pay for them?
- Ahmad paid a total of $55.65 for his two books. He paid $10.85 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% $21 |
100% $19 |
|
Discount |
- 5% |
- 30% |
|
Sale price |
95% |
70% |
? |
(a)
Selling price of the 1st book
= 95% x 21
=
95100 x 21
= $19.95
Selling price of 2nd book
= 70% x 19
=
70100 x 19
= $13.30
Total amount that Abi paid
= 19.95 + 13.30
= $33.25
|
1st book |
2nd book |
Total amount |
Original price |
100% |
100% |
|
Discount |
- 5% |
- 30% |
|
Sale price |
95%
|
70%
|
|
Compare 1st book and 2nd book |
1 u + $10.85 |
1 u |
$55.65 |
(b)
Sale price of the 1st book = 1 u + 10.85
Sale price of the 2nd book = 1 u
Total amount that Ahmad paid
= 1 u + 10.85 + 1 u
= 2 u + 10.85
2 u + 10.85 = 55.65
2 u = 55.65 - 10.85
2 u = 44.80
1 u = 44.80 ÷ 2 = 22.40
Sale price of the 2nd book = $22.40
70% of the price = $22.40
100% of the price =
22.4070 x 100 = $32
Selling price of the 2nd book before discount = $32
Answer(s): (a) $33.25; (b) $32