Answer:$9Explanation:
From the question, we are given the following:
Total price before any discount = $810
Total price with the discount = $729
Discount given = $810 - $729
Discount given = $81
Since each person in the group receives a student discount, the amount of discount per person is expressed as:
Amount of discount per person = Discount/Total number of friends
Amount of discount per person = $81/9
Amount of discount per person = $9
This shows that the discount price per person is $9