Final answer:
A is a subset of a specified population containing the even numbers 2, 6, 12, and 24.
Step-by-step explanation:
If a population consists of the positive even numbers through 30, and if A = (2,6,12,24), then A is a subset of this population. The subset A includes the even numbers listed in the sequence provided. In the context of sets, A is simply the collection of numbers that have been identified, which in this case are specific even numbers that are part of the larger set of positive even numbers up to 30.