Graph 9 project
A person came to the bar to play cards. He brought 40$ with him. The first 30 min he was unsure if he wanted to use his money. Then he decided that he will play. At first he was unlucky. He played for 30 minutes and lost 10$. He wasn't discouraged and continued playing, This time he was lucky and after another-final 30 minutes he gained 40$. Then he decided that this was enough. He spent an hour and a half at the bar and won 30$. Content with his life he returned home.