In a family of 4 adults and some minors, the average consumption of rice per head per month is 8.5 kg, while the average consumption for adults is 10 kg per head and for minor it is 5.5 kg per head. The number of minors in the family is:
Show answer & explanation
Correct answer: D
Explanation
The correct answer is option 4 i.e. 2
Let the number of minors in a family be x
Average = sum of all consumptions/total number of members
A/C to question,
(4 + x) × 8.5 = (10 × 4) + (5.5 × x)
34 + 8.5x = 40 + 5.5x
6 = 3x
x = 2
Hence number of minors in a family are 2