Lynn bought some Malay books at $10 each. She also bought an equal number of Chinese books at a different price. The average price of one Malay and one Chinese book was $7. Lynn paid $72 more for the Malay books than the Chinese books.
- What was the cost of one Chinese book?
- How many Malay books did Lynn buy?
|
Malay |
Chinese |
More |
Number |
1 u |
1 u |
|
Value |
$10 |
$4 |
|
Total value |
10 u |
4 u |
$72 |
(a)
Price of one Chinese book
= 2 x 7 - 10
= 14 - 10
= $4
Amount that Lynn paid more for Malay books than Chinese books
= 10 u - 4 u
= 6 u
6 u = 72
1 u = 72 ÷ 6 = 12
Number of Malay books that Lynn bought
= 1 u
= 12
Answer(s): (a) $4; (b) 12