Erika bought some French books at $11 each. She also bought an equal number of Malay books at a different price. The average price of one French and one Malay book was $9. Erika paid $40 more for the French books than the Malay books.
- What was the cost of one Malay book?
- How many French books did Erika buy?
|
French |
Malay |
More |
Number |
1 u |
1 u |
|
Value |
$11 |
$7 |
|
Total value |
11 u |
7 u |
$40 |
(a)
Price of one Malay book
= 2 x 9 - 11
= 18 - 11
= $7
Amount that Erika paid more for French books than Malay books
= 11 u - 7 u
= 4 u
4 u = 40
1 u = 40 ÷ 4 = 10
Number of French books that Erika bought
= 1 u
= 10
Answer(s): (a) $7; (b) 10