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the management of a store holding a 4 week sale finds that [#permalink]
15 Feb 2005, 07:02
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the management of a store holding a 4 week sale finds that the average of daily sales increases each week by the same amount. if the overall average for the entire sale was 3,300$ and the average for week 3 was 20% higher than the average for week 2, by how much did the average for the last week exceed the average daily sales for the first week ?