Visitors to a show were charged ₹10 each on the first day, ₹5 on the second day and ₹2 on the third day and the total attendance on the three days was in the ratio 15 : 2 : 3. What is the average charge per person for the visitors to the show on the three days taken together?

₹8.30

Rs. 10 : Rs. 5 : Rs. 2

  15    :   2     :    3

Total Expenditure

⇒ 15 x 10 : 5 x 2 : 2 x 3

⇒ 150 : 10 : 6 = 150 + 10 + 6 = 166

Total attendance ⇒ 15 + 2 + 3 = 20

⇒ The average charge per person for the visitors to the show on the three days taken together = \(\frac{166}{20}\) = Rs. 8.3