Gwen bought some Geography books at $16 each. She also bought an equal number of Japanese books at a different price. The average price of one Geography and one Japanese book was $10. Gwen paid $36 less for the Japanese books than the Geography books.
- What was the cost of one Japanese book?
- How many Geography books did Gwen buy?
|
Geography |
Japanese |
Less |
Number |
1 u |
1 u |
|
Value |
$16 |
$4 |
|
Total value |
16 u |
4 u |
$36 |
(a)
Price of one Japanese book
= 2 x 10 - 16
= 20 - 16
= $4
Amount that Gwen paid less for Japanese books than Geography books
= 16 u - 4 u
= 12 u
12 u = 36
1 u = 36 ÷ 12 = 3
Number of Geography books that Gwen bought
= 1 u
= 3
Answer(s): (a) $4; (b) 3