There were some kiwis, lemons and passion fruits. The number of kiwis was three times the number of lemons. The total number of kiwis and lemons was half of the number of passion fruits. There were 168 fruits altogether. All the passion fruits were sold at 7 for $8. How much money was collected from the sale of the passion fruits?
Number of lemons = 1 u
Number of kiwis = 3 u

Total number of lemons and kiwis
= 1 u + 3 u
= 4 u

Number of passion fruits
= 2 x 4 u
= 8 u

Total number of fruits
= 1 u + 3 u + 8 u
= 12 u

12 u = 168

1 u = 168 ÷ 12 = 14

Number of passion fruits sold
= 8 u
= 8 x 14
= 112

Number of sets of 7 passion fruits
= 112 ÷ 7
= 16

Amount collected from the sale of passion fruits
= 16 x 8
= $128

Answer(s): $128