Oksana and her three friends are heading to a concert. They paid $540 in total for tickets. This included insurance for $15 for each person. How much was the cost of one ticket to the concert?

Answer 1

The total cost of insurance for the four people was $15/person x 4 people = $<<15*4=60>>60.
The total cost of tickets without insurance was $540 - $60 = $<<540-60=480>>480.
The cost of one ticket was $480 / 4 people = $<<480/4=120>>120/person. Answer: \boxed{120}.