A fruit seller had oranges and starfruits. The ratio of oranges to starfruits was 4 : 11. After
25 of the oranges and 57 starfruits were sold, there were 3 times as many oranges as starfruits left. How many oranges and starfruits were there at first?
| |
Oranges |
Starfruits |
Total |
| Before |
4 u |
11 u |
15 u |
| Change |
- 1.6 u |
- 57 |
|
| After |
2.4 u |
7.2 u |
|
Number of oranges sold
=
25 x 4 u
= 1.6 u
Number of oranges left
= 4 u - 1.6 u
= 2.4 u
Number of starfruits left
= 3 x 2.4 u
= 7.2 u
Number of starfruits sold
= 11 u - 7.2 u
= 3.8 u
3.8 u = 57
1 u = 57 ÷ 3.8 = 15
Number of oranges and starfruits at first
= 4 u + 11 u
= 15 u
= 15 x 15
= 225
Answer(s): 225
