The average monthly expenditure of a family was Rs. 2,500 during the first 4 months, Rs. 2,750 during the next 5 months and Rs. 3,550 during the last 3 months of a year. If the total saving during the year was Rs. 5,500, what was the average monthly income of the family?
1
Rs. 3,325
2
Rs. 4,375
3
Rs. 7,355
4
Rs. 5,790