Rachel bought some Malay books at $12 each. She also bought an equal number of Physics books at a different price. The average price of one Malay and one Physics book was $8. Rachel paid $56 less for the Physics books than the Malay books.
- What was the cost of one Physics book?
- How many Malay books did Rachel buy?
|
Malay |
Physics |
Less |
Number |
1 u |
1 u |
|
Value |
$12 |
$4 |
|
Total value |
12 u |
4 u |
$56 |
(a)
Price of one Physics book
= 2 x 8 - 12
= 16 - 12
= $4
Amount that Rachel paid less for Physics books than Malay books
= 12 u - 4 u
= 8 u
8 u = 56
1 u = 56 ÷ 8 = 7
Number of Malay books that Rachel bought
= 1 u
= 7
Answer(s): (a) $4; (b) 7