Elyse bought some History books at $19 each. She also bought an equal number of French books at a different price. The average price of one History and one French book was $11. Elyse paid $192 more for the History books than the French books.
- What was the cost of one French book?
- How many History books did Elyse buy?
|
History |
French |
More |
Number |
1 u |
1 u |
|
Value |
$19 |
$3 |
|
Total value |
19 u |
3 u |
$192 |
(a)
Price of one French book
= 2 x 11 - 19
= 22 - 19
= $3
Amount that Elyse paid more for History books than French books
= 19 u - 3 u
= 16 u
16 u = 192
1 u = 192 ÷ 16 = 12
Number of History books that Elyse bought
= 1 u
= 12
Answer(s): (a) $3; (b) 12