Question

Suppose there are 4 families in a country with per capita income of $ 15000 the income of 3 families is $10000,$20000,$12000 respectively what is the income of 4th family

Answer 1

I think 1212000 is income of 4th family

Answer 2

Per capita income=total income/population

Thus, 15000=10000+20000+12000+x / 4

Where x is income of 4th family

60000-42000=x

So x= 18000$=income of 4th family