A fruit seller had starfruits and oranges. The ratio of starfruits to oranges was 4 : 11. After
25 of the starfruits and 7 oranges were sold, there were 4 times as many starfruits as oranges left. How many starfruits and oranges were there at first?
| |
Starfruits |
Oranges |
Total |
| Before |
4 u |
11 u |
15 u |
| Change |
- 1.6 u |
- 7 |
|
| After |
2.4 u |
9.6 u |
|
Number of starfruits sold
=
25 x 4 u
= 1.6 u
Number of starfruits left
= 4 u - 1.6 u
= 2.4 u
Number of oranges left
= 4 x 2.4 u
= 9.6 u
Number of oranges sold
= 11 u - 9.6 u
= 1.4 u
1.4 u = 7
1 u = 7 ÷ 1.4 = 5
Number of starfruits and oranges at first
= 4 u + 11 u
= 15 u
= 15 x 5
= 75
Answer(s): 75
