Dana bought some Literature books at $14 each. She also bought an equal number of Physics books at a different price. The average price of one Literature and one Physics book was $11. Dana paid $30 less for the Physics books than the Literature books.
- What was the cost of one Physics book?
- How many Literature books did Dana buy?
|
Literature |
Physics |
Less |
Number |
1 u |
1 u |
|
Value |
$14 |
$8 |
|
Total value |
14 u |
8 u |
$30 |
(a)
Price of one Physics book
= 2 x 11 - 14
= 22 - 14
= $8
Amount that Dana paid less for Physics books than Literature books
= 14 u - 8 u
= 6 u
6 u = 30
1 u = 30 ÷ 6 = 5
Number of Literature books that Dana bought
= 1 u
= 5
Answer(s): (a) $8; (b) 5