Min bought some Physics books at $14 each. She also bought an equal number of Biology books at a different price. The average price of one Physics and one Biology book was $11. Min paid $60 less for the Biology books than the Physics books.
- What was the cost of one Biology book?
- How many Physics books did Min buy?
|
Physics |
Biology |
Less |
Number |
1 u |
1 u |
|
Value |
$14 |
$8 |
|
Total value |
14 u |
8 u |
$60 |
(a)
Price of one Biology book
= 2 x 11 - 14
= 22 - 14
= $8
Amount that Min paid less for Biology books than Physics books
= 14 u - 8 u
= 6 u
6 u = 60
1 u = 60 ÷ 6 = 10
Number of Physics books that Min bought
= 1 u
= 10
Answer(s): (a) $8; (b) 10