Hilda bought some History books at $19 each. She also bought an equal number of Geography books at a different price. The average price of one History and one Geography book was $11. Hilda paid $48 less for the Geography books than the History books.
- What was the cost of one Geography book?
- How many History books did Hilda buy?
|
History |
Geography |
Less |
Number |
1 u |
1 u |
|
Value |
$19 |
$3 |
|
Total value |
19 u |
3 u |
$48 |
(a)
Price of one Geography book
= 2 x 11 - 19
= 22 - 19
= $3
Amount that Hilda paid less for Geography books than History books
= 19 u - 3 u
= 16 u
16 u = 48
1 u = 48 ÷ 16 = 3
Number of History books that Hilda bought
= 1 u
= 3
Answer(s): (a) $3; (b) 3