To find the outcomes for the event of rolling an even number less than 5 on a regular 10-sided number cube (which has the numbers 1 through 10), we look for the even numbers in that range.
The even numbers from 1 to 10 are: 2, 4, 6, 8, 10.
Now, we need to identify which of these even numbers are less than 5:
- The even numbers less than 5 are: 2 and 4.
Thus, the outcomes for the event of rolling an even number less than 5 are {2, 4}.
The correct answer is A. {2, 4}.