There are four members in a family. Their average income is Rs.10000 per month. Three members get Rs.8000, Rs.15000, Rs.6000 respectively. Therefore what is the income of the fourth member of the family? Choose the correct choice from the following answers:  A) Rs. 10000  B) Rs. 11000  C) Rs. 12000  D) Rs. 9000  E) Rs. 8500
EXPLANATION   Total income of 3 members = Rs. (8000 + 15000 + 6000) = Rs. 29000.   Required income = Rs. [ (10000 x 4) – 29000 ]   = Rs. (40000 – 29000)   = Rs. 11000.   Answer Rs. 11000
<result>B</result>
There are four members in a family. Their average income is Rs.10000 per month. Three members get Rs.8000, Rs.15000, Rs.6000 respectively. Therefore what is the income of the fourth member of the family?