Question

There are four families living in a neighbourhood. The average per capita income of these families is `6000/- If the income of three families is `4000/-, `7000/- and `5000/- respectively, what is the income of the fourth family

Answer 1

Answer:

8000/-

Explanation:

Let the income of the fourth family be X

4000 + 7000+ 5000+ x / 4 = 6000

Cross multiply

16000 + X = 24000

Collect like terms

X = 8,000

The income of the fourth family is 8,000

Answer 2

Answer: Rs8000

Explanation:

Total income of 4 families is 6000 x4 =Rs24,000

Total income of 3 families

4000 +7000 + 5000 =16,000

4th family income =24000- 16000 =Rs8000