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Question 74
The bar graph shows the number of paintings sold by an art gallery in each month from January to June. How many paintings does it need to sell in July for the 7 month average to be 90?
Solution
Let the number of paintings to be sold in July = x
Given, $$\dfrac{95+78+97+110+60+80+x}{7} = 90$$
=> $$520+x = 630$$
=> x = 110
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