Question
The average monthly expenditure of a family was ₹8,600
during the first three months, ₹9,750 during the next four months and ₹9,920 during the last five months of a year. If the total savings during the year was ₹65,300, the average monthly income (in ₹) of the family was:Solution
Total expenditure First 3 months: ₹8600 × 3 = ₹25,800 Next 4 months: ₹9750 × 4 = ₹39,000 Last 5 months: ₹9920 × 5 = ₹49,600 Total expenditure = 25,800 + 39,000 + 49,600 = ₹114,400 Total income = expenditure + savings = ₹114,400 + ₹65,300 = ₹179,700 Average monthly income = 179,700 ÷ 12 = ₹14,975
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