I thought I had this right but I keep getting it wrong

Question

A garage code has 4 digits 0-9. What is the probability of guessing the code correctly on the first try?

Answer 1

Assuming you can repeat the digits in the 4-digit code. When entering first number in the code, you have all ten digits (0-9) as an option. What's the probability of getting the first number in the code correct? 1 out of 10 chances, or 1/10. This is the same probability for the second number in the code, as well as the third and fourth numbers in the code. This means it's (1/10) x (1/10) x (1/10) x (1/10) = (1/10,000) or 1 / 10^4 chances of getting the garage's 4-digit code correct on the first try.

Answer 2

Assuming all 10 digits can be repeated:

1 / 10⁴