Final answer:
The set of vowels in the word "PANDEMIC" is {A, E, I}, and the cardinality, representing the count of unique elements in this set, is 3.
Step-by-step explanation:
The question asks about the cardinality of the set of vowels in the word "PANDEMIC". Cardinality refers to the number of elements in a set. To solve this, identify all the vowels in the word "PANDEMIC", which are A, E, and I. Since each vowel appears only once in the word, there are no duplicates to consider in the set. Hence, the set of vowels is {A,E,I}, and the cardinality of this set is 3.
Therefore, the cardinality of the set of vowels in the word "PANDEMIC" is 3.