Answer:
option C:
25
Step-by-step explanation:
total people = 75
College graduates = 2/5 of the total
= 2/5 * 75 = 30 people
left = 75 - 30 = 45 people
seniors in high school = 4/9 of the people who are not college graduates
= 4/9 * 45 = 20 people
thus,
people in the room who are neither college graduates nor high school seniors = 45 - 20 = 25