There were some chikoos, passion fruits and mangosteens. The number of chikoos was two times the number of passion fruits. The total number of chikoos and passion fruits was one-quarter of the number of mangosteens. There were 150 fruits altogether. All the mangosteens were sold at 5 for $6. How much money was collected from the sale of the mangosteens?
Number of passion fruits = 1 u
Number of chikoos = 2 u

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

Number of mangosteens
= 4 x 3 u
= 12 u

Total number of fruits
= 1 u + 2 u + 12 u
= 15 u

15 u = 150

1 u = 150 ÷ 15 = 10

Number of mangosteens sold
= 12 u
= 12 x 10
= 120

Number of sets of 5 mangosteens
= 120 ÷ 5
= 24

Amount collected from the sale of mangosteens
= 24 x 6
= $144

Answer(s): $144