PSLEA stallholder had an equal number of lemons, mangoes and grapefruits at first. After 63 grapefruits, some lemons and mangoes were sold, there were 131 fruits left. There were 3 times as many lemons as mangoes left. The number of grapefruits left was 30 less than the number of lemons left. How many mangoes were sold?
|
Lemons |
Mangoes |
Grapefruits |
Total |
Before |
1 |
1 |
1 |
|
Change |
- ? |
- ? |
- 63 |
|
After |
3 u |
1 u |
3 u - 30 |
131 |
Total number of fruits in the end
= 3 u + 1 u + 3 u - 30
= 7 u - 30
7 u - 30 = 131
7 u = 131 + 30
7 u = 161
1 u = 161 ÷ 7 = 23
Number of grapefruits at first
= 3 u - 30 + 63
= 3 x 23 + 33
= 102
The number of grapefruits and mangoes at first is the same.
Number of mangoes sold
= 102 - 23
= 79
Answer(s): 79