Question
The average expenditure of a man for the first 5 month
is Rs.4000 and for the next 7 months is Rs.6000. If he saves 10000 in that year then find his average monthly income.Solution
Total expenditure in first 5 months = 5 × 4000 = Rs.20000 Total expenditure in last 7 month = 7 × 6000 = Rs.42000 Total income of the man in a year = 20000 + 42000 + 10000 = Rs.72000 So average income in a month = 72000/12 = Rs. 6000
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