The average sales of a product for a particular week

Question

The average sales of a product for a particular week, excluding Sunday, were reported by the city departmental store as 150 units. Sunday being a national festival, there was heavy rush of sales which inflated average sales for the entire week to 210 units. Find the sales for Sunday

Answer 1

Total Number of Days excluding Sunday = 6

Let x = Total Sale of Product for a week excluding Sunday

 

x/6 days =Average Sales of Product

x/6 = 150

x = 150 units * 6 days = 900 units for 6 days

 

For entire week (7 days),

Total sales = average sales for entire week x 7 days

Total Sales = 210 units x 7 days = 1470 units

 

Sale for Sunday = Total sales for entire week - Total sales for week except Sunday

Sale for Sunday = 1470 units - 900 units = 570 units

 

570 units are sold for Sunday.