Raeann bought some Social Science books at $10 each. She also bought an equal number of Biology books at a different price. The average price of one Social Science and one Biology book was $8. Raeann paid $24 more for the Social Science books than the Biology books.
- What was the cost of one Biology book?
- How many Social Science books did Raeann buy?
|
Social Science |
Biology |
More |
Number |
1 u |
1 u |
|
Value |
$10 |
$6 |
|
Total value |
10 u |
6 u |
$24 |
(a)
Price of one Biology book
= 2 x 8 - 10
= 16 - 10
= $6
Amount that Raeann paid more for Social Science books than Biology books
= 10 u - 6 u
= 4 u
4 u = 24
1 u = 24 ÷ 4 = 6
Number of Social Science books that Raeann bought
= 1 u
= 6
Answer(s): (a) $6; (b) 6