+328 Of the one hundred 5th-graders at Evergreen Elementary, 40 signed up for the Math Club, 30 signed up for the Science Club, and there were at least 5 known students who didn’t sign up for either clubs, and at least 10 students known to have signed up for both clubs. Principal Edwards wanted to know how much students would end up not signing up for either clubs. Unfortunately he didn’t how many students signed up for both clubs. Based on the given information, what is the maximum possible number of students who have not signed up for anything?
