PSLEA stallholder had an equal number of mangosteens, dragonfruits and starfruits at first. After 57 starfruits, some mangosteens and dragonfruits were sold, there were 153 fruits left. There were 3 times as many mangosteens as dragonfruits left. The number of starfruits left was 22 fewer than the number of mangosteens left. How many dragonfruits were sold?
|
Mangosteens |
Dragonfruits |
Starfruits |
Total |
Before |
1 |
1 |
1 |
|
Change |
- ? |
- ? |
- 57 |
|
After |
3 u |
1 u |
3 u - 22 |
153 |
Total number of fruits in the end
= 3 u + 1 u + 3 u - 22
= 7 u - 22
7 u - 22 = 153
7 u = 153 + 22
7 u = 175
1 u = 175 ÷ 7 = 25
Number of starfruits at first
= 3 u - 22 + 57
= 3 x 25 + 35
= 110
The number of starfruits and dragonfruits at first is the same.
Number of dragonfruits sold
= 110 - 25
= 85
Answer(s): 85