In a family of six males and a few females, the average monthly consumption of grain per head is 14.4 kg. If the average monthly consumption per head is 20 kg in the case of males and 6 kg in the case of females, find the number of females in the family?
Answer & explanation
Correct answer: option 2
Let number of females = F
ATQ,
6 × 20 + F × 6 = ( 6+F) × 14.4
120 + 6F = 86.4 + 14.4F
8.4F = 33.6
F = 4
so , Number of females are 4