Final answer:
To find out how many adult tickets were sold, we need to determine the number of students who attended and subtract that from the total number of tickets sold. Since 28 students attended, the remaining tickets must be adult tickets. Therefore, the number of adult tickets sold is the total number of tickets minus 28. If we assume that all tickets sold were either for students or adults, the total number of tickets sold would be the sum of the number of student tickets and the number of adult tickets. Since the problem doesn't provide the total number of tickets sold, we can't determine the exact number of adult tickets. Therefore, the answer is D. Cannot be determined.
Step-by-step explanation:
To find out how many adult tickets were sold, we need to determine the number of students who attended and subtract that from the total number of tickets sold. Since 28 students attended, the remaining tickets must be adult tickets. Therefore, the number of adult tickets sold is the total number of tickets minus 28.
If we assume that all tickets sold were either for students or adults, the total number of tickets sold would be the sum of the number of student tickets and the number of adult tickets.
Since the problem doesn't provide the total number of tickets sold, we can't determine the exact number of adult tickets. Therefore, the answer is D. Cannot be determined.