Answer:
Probability of winning the game: 1/10000
Explanation:
The nominator in the only outcome possible for you to win the bet. So that would be your only selected fourdigit number.
The denominator is the total possibles outcomes. If the first posible number is 0000 and the last number is 9999. There are a total of 10000 possible outcomes that the selected number is drawn.
The general rule is

Where p are the draws where i win.
And q is the total population of possible numbers.