Roshel bought some Biology books at $14 each. She also bought an equal number of Japanese books at a different price. The average price of one Biology and one Japanese book was $12. Roshel paid $24 less for the Japanese books than the Biology books.
- What was the cost of one Japanese book?
- How many Biology books did Roshel buy?
|
Biology |
Japanese |
Less |
Number |
1 u |
1 u |
|
Value |
$14 |
$10 |
|
Total value |
14 u |
10 u |
$24 |
(a)
Price of one Japanese book
= 2 x 12 - 14
= 24 - 14
= $10
Amount that Roshel paid less for Japanese books than Biology books
= 14 u - 10 u
= 4 u
4 u = 24
1 u = 24 ÷ 4 = 6
Number of Biology books that Roshel bought
= 1 u
= 6
Answer(s): (a) $10; (b) 6