Zoe bought some Maths books at $14 each. She also bought an equal number of Malay books at a different price. The average price of one Maths and one Malay book was $9. Zoe paid $110 more for the Maths books than the Malay books.
- What was the cost of one Malay book?
- How many Maths books did Zoe buy?
|
Maths |
Malay |
More |
Number |
1 u |
1 u |
|
Value |
$14 |
$4 |
|
Total value |
14 u |
4 u |
$110 |
(a)
Price of one Malay book
= 2 x 9 - 14
= 18 - 14
= $4
Amount that Zoe paid more for Maths books than Malay books
= 14 u - 4 u
= 10 u
10 u = 110
1 u = 110 ÷ 10 = 11
Number of Maths books that Zoe bought
= 1 u
= 11
Answer(s): (a) $4; (b) 11