A fruit seller had starfruits and mangoes. The ratio of starfruits to mangoes was 3 : 7. After
34 of the starfruits and 19 mangoes were sold, there were 3 times as many starfruits as mangoes left. How many starfruits and mangoes were there at first?
| |
Starfruits |
Mangoes |
Total |
| Before |
3 u |
7 u |
10 u |
| Change |
- 2.25 u |
- 19 |
|
| After |
0.75 u |
2.25 u |
|
Number of starfruits sold
=
34 x 3 u
= 2.25 u
Number of starfruits left
= 3 u - 2.25 u
= 0.75 u
Number of mangoes left
= 3 x 0.75 u
= 2.25 u
Number of mangoes sold
= 7 u - 2.25 u
= 4.75 u
4.75 u = 19
1 u = 19 ÷ 4.75 = 4
Number of starfruits and mangoes at first
= 3 u + 7 u
= 10 u
= 10 x 4
= 40
Answer(s): 40
