Answer: 15 tickets
Step-by-step explanation:
given that the cost of the bear = 30 tickets
He has paid $5 for 10 tokens to use to play games . And So far he's won 15 tickets and used 7 tokens for different games. Since he has won 15 tickets, then
He needs to will 30 -15 = 15 tickets
The best unit for the answer is ticket