Question

The average monthly expenditure of Mr Ravi's family for the first three months is Rs.2,750, for the next three months is Rs.2,940 and for the last three months Rs.3,150. If his family saves Rs.4980 for nine months, find the average monthly income of the family for the 9 months?

• A. Rs.3800
• B. Rs.3500
• C. Rs.3400
• D. Rs.4200
• E. Rs.4500

Answer 1

The correct option is B Rs.3500

Average monthly expenditure for 3 months= Rs. 2750
Total expenditure for 3 months =Rs. $2750\times 3$=Rs. 8250
Average monthly expenditure for 3 months=Rs. 2940
Total expenditure for 3 months =Rs. $2940\times 3$=Rs. 8820
Average monthly expenditure for 3 months =Rs. 3150
Total expenditure for 3 months=Rs. $3150\times 3$=Rs. 9450
Total savings for 9 months =4980
Average monthly income for 9 months $=(8250+8820+9450+4980)÷9=3500$