The following bar chart shows the number of pens (in '000s) sold by 6 different shops during a given year.

If the cost of each pen is ₹4.50, then what is the average revenue earned per shop?

₹90,000

Total number of pens sold = 15 + 18 + 22 + 27 + 21 + 17 = 120

Average of total number of pens sold = \(\frac{120}{6}\) = 20

Cost of each pen = 4.50.

Average revenue earned per shop = 4.5 × 20 × 1000 =  90000