Final answer:
To find the total number of students attending the event, we use the information that 40% of students wanted chocolate milk, for which 16 units were ordered. By setting up a proportion (0.40 * x = 16), we find that there are 40 students attending, corresponding to option C.
Step-by-step explanation:
To find out the total number of students attending the event, we need to determine the total number based on the amount of chocolate milk ordered. Since 40% of the students wanted chocolate milk and the cafeteria ordered 16 units for those 40%, we can set up a proportion to find out the 100%.
Let the total number of students be x. We can set up the following equation:
0.40 * x = 16
Dividing both sides by 0.40 gives us:
x = 16 / 0.40
x = 40
Therefore, there are 40 students attending the event. The correct answer is option C.