D. Umm explanation you’re not asking for who but the number of students.
Do 36 times 2 and you should get the answer for red marbles or... Mainly the answer is 72... Your welcome...!!!
Can you put more context?
Answer:
3
Step-by-step explanation:
Explanation: find the area of the trapezoid, then find the area of the rectangle, then add both areas to get the total area of the figure.