Question

in a family 8 adults and some minors the average consumption of rise per head per month is 10.8kg while average consumption for adult is 15 kg per head and minors it is 6 kg per head . the number of minor in the family is.

Answer 1

let no of minors be x
thus average consumption = 15*8+6*x /8+x = 10.8
x =7
minors are 7

Answer 2

Answer:

In the family, the number of minors are 7.

Step-by-step explanation:

Let the number of minors be x.

There are 8 adults and the consumption of rice per month = 15 kg per head

Consumption of rice on minors per month = 6 kg per head

while the average consumption of rice per month = 10.8 per head

Therefore, $\frac{(8\times 15)+(x\times 6)}{(8+x)}=10.8$

= 120 + 6x = 86.4 + 10.8x

10.8x - 6x = 120 - 86.4

4.8x = 33.6

x = $\frac{33.6}{4.8}$

x = 7

In the family, the number of minors are 7.

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