How do I answer this question?

Question 6 1 pts Consider a 4-digit lock where each digit can take any integer value between 0 and 9. Each 4-digit code is equally likely and the order of the digits matter (e.g., 1-2-3-4 is a different code than 4-3-2- 1). Now consider the following events: Event A: 5 occurs exactly once in the 4-digit code; Event B: 3 occurs exactly once in the 4-digit code. What is the probability P (An B)? O 768/10,000 O 284/10,000 O 64/10,000 1536/10,000