The average monthly expenditure of a family was rs. 2200 during the first 3 months, rs.2250 during the next 4 months and rs.3120 during the last 5 months of a year. If the total savings during the year were rs.1260, then the average monthly income was
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2200*3+2250*4+3120*7+1260 are summing up to yearly income 32460.
2705 is monthly income(divide by 12
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