There were some passion fruits, kiwis and persimmons. The number of passion fruits was two times the number of kiwis. The total number of passion fruits and kiwis was half of the number of persimmons. There were 189 fruits altogether. All the persimmons were sold at 6 for $9. How much money was collected from the sale of the persimmons?
Number of kiwis = 1 u
Number of passion fruits = 2 u

Total number of kiwis and passion fruits
= 1 u + 2 u
= 3 u

Number of persimmons
= 2 x 3 u
= 6 u

Total number of fruits
= 1 u + 2 u + 6 u
= 9 u

9 u = 189

1 u = 189 ÷ 9 = 21

Number of persimmons sold
= 6 u
= 6 x 21
= 126

Number of sets of 6 persimmons
= 126 ÷ 6
= 21

Amount collected from the sale of persimmons
= 21 x 9
= $189

Answer(s): $189