The average expenditure of a man for the first 4 and the last 2 days is Rs 45 and Rs 36 respectively. If the average expenditure for the first 7 days be Rs 40 find his expenditure gor the seventh day?
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Step-by-step explanation:
average expenditure for the first 4 days = rs 45
total expenditure for the first 4 days = 45×4 = rs 180
average expenditure for the last 2 days = rs 36
total expenditure for the last 2 days = 36×2 = rs 72
total expenditure for the first 4 and last 2 days = 180+72 = rs 252
average expenditure for the first 7 days = rs 40
total expenditure for the first 7 days = 40×7 = rs 280
expenditure for the seventh day = 280 - 252 = rs 28
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