.................

............. flip the coin...... head, tail, head, tail , head .....

The best combination was 19 and 24. That combination made $15,000.
The combination of 17 and 24 made only $3,000.
The combination 16 and 24 lost $3,000.
The combination 19 and 25 made $5,000, while 26 and higher lost money.

31 combinations made money, while 465 lost money.