Zara bought some Japanese books at $13 each. She also bought an equal number of Chinese books at a different price. The average price of one Japanese and one Chinese book was $9. Zara paid $40 more for the Japanese books than the Chinese books.
- What was the cost of one Chinese book?
- How many Japanese books did Zara buy?
|
Japanese |
Chinese |
More |
Number |
1 u |
1 u |
|
Value |
$13 |
$5 |
|
Total value |
13 u |
5 u |
$40 |
(a)
Price of one Chinese book
= 2 x 9 - 13
= 18 - 13
= $5
Amount that Zara paid more for Japanese books than Chinese books
= 13 u - 5 u
= 8 u
8 u = 40
1 u = 40 ÷ 8 = 5
Number of Japanese books that Zara bought
= 1 u
= 5
Answer(s): (a) $5; (b) 5