When a person calculated his expenses from Sunday to Thursday, he found the average expenditure to be 400 rupees per day. Including Friday, the average increased to 430 rupees per day. How much did he spent on Friday? Including Saturday, the average decresed to 390 rupees per day. How much did he spend on Saturday?

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Solution

The average expense for 5 days from Sunday = 400 rupees

Total expense for 5 day from Sunday = 400 x 5 = 2000 rupees

Average expense for 6 days including Friday =430 rupees

Total expense for 6 days including Friday = 430 x 6 = 2580 rupees

Expense on Friday = 2580 – 2000 =580 rupees

Average expense for 7 days including Saturday =390 rupees

Total expense for 7 days including Saturday = 390 x 7 = 2730 rupees

Expense on Saturday = 2730 - 2580 =150rupees

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