Hilda bought some Physics books at $11 each. She also bought an equal number of Malay books at a different price. The average price of one Physics and one Malay book was $9. Hilda paid $44 more for the Physics books than the Malay books.
- What was the cost of one Malay book?
- How many Physics books did Hilda buy?
|
Physics |
Malay |
More |
Number |
1 u |
1 u |
|
Value |
$11 |
$7 |
|
Total value |
11 u |
7 u |
$44 |
(a)
Price of one Malay book
= 2 x 9 - 11
= 18 - 11
= $7
Amount that Hilda paid more for Physics books than Malay books
= 11 u - 7 u
= 4 u
4 u = 44
1 u = 44 ÷ 4 = 11
Number of Physics books that Hilda bought
= 1 u
= 11
Answer(s): (a) $7; (b) 11