Final answer:
Set A = {a, b, c} has 8 subsets including the empty set, calculated by the formula 2 to the power of the number of elements in the set.
Step-by-step explanation:
The number of subsets of a set, including the empty set, can be determined using the formula 2n, where n is the number of elements in the set. For the set A = {a, b, c}, which has 3 elements, the calculation would be 23 = 8. Therefore, set A has 8 subsets including the empty set.