Yoko bought some Maths books at $14 each. She also bought an equal number of Geography books at a different price. The average price of one Maths and one Geography book was $11. Yoko paid $24 less for the Geography books than the Maths books.
- What was the cost of one Geography book?
- How many Maths books did Yoko buy?
|
Maths |
Geography |
Less |
Number |
1 u |
1 u |
|
Value |
$14 |
$8 |
|
Total value |
14 u |
8 u |
$24 |
(a)
Price of one Geography book
= 2 x 11 - 14
= 22 - 14
= $8
Amount that Yoko paid less for Geography books than Maths books
= 14 u - 8 u
= 6 u
6 u = 24
1 u = 24 ÷ 6 = 4
Number of Maths books that Yoko bought
= 1 u
= 4
Answer(s): (a) $8; (b) 4