Anna bought some History books at $17 each. She also bought an equal number of Literature books at a different price. The average price of one History and one Literature book was $12. Anna paid $80 more for the History books than the Literature books.
- What was the cost of one Literature book?
- How many History books did Anna buy?
|
History |
Literature |
More |
Number |
1 u |
1 u |
|
Value |
$17 |
$7 |
|
Total value |
17 u |
7 u |
$80 |
(a)
Price of one Literature book
= 2 x 12 - 17
= 24 - 17
= $7
Amount that Anna paid more for History books than Literature books
= 17 u - 7 u
= 10 u
10 u = 80
1 u = 80 ÷ 10 = 8
Number of History books that Anna bought
= 1 u
= 8
Answer(s): (a) $7; (b) 8