plz give answer
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THE ANSWER IS HERE,
Per capita income of 4 families is $15,000.
Income of 3 families are $10,000 ; $20,000 ; $12,000.
Per capita income= Total income / total population.
Let the income of 4th family be x.Then
15,000=(10,000+20,000+ 12,000+x)/4
=>60,000 = 42,000+x
=> x =60,000-42,000.
=> x = $18,000.
so, the income of 4th family is $18,000.
:-)Hope it helps u.
10000+12000+20000+(x)= 42000+(x)
--------------------------------- -------------- = 15000
4
42000+(x)= 60000
x=60000-42000
x= 18000