Final answer:
The set intersection of C and D contains 2 elements.
Step-by-step explanation:
The intersection of two sets, represented as C ∩ D, refers to the elements that are common to both sets. In this case, we are looking for the common elements in the sets C = {40, 60, 360, 38} and D = {60, 38}. By comparing these sets, we can see that the numbers 60 and 38 appear in both sets. Hence, the elements of the intersection of sets C and D are 60 and 38.
Therefore, the number of people in the set C ∩ D, or the number of elements in the intersection of the two sets, is 2.
Learn more about Intersection of Sets