<p>Is there a fast way to answer these questions without using too much algebra? it took me 10 minutes to solve these.</p>
<p>At a certain college, the number of freshmen is three times the number of seniors. If 1/4 of the freshmen and 1/3 of the seniors attend a football game, what fraction of the total number of freshmen and seniors attends the game?
<p>At Jones College, there are a total of 100 students. If 30 of the students have cars on campus, and 50 have bicycles, and 20 have both cars and bicycles, then how many students have neither a car nor a bicycle on campus?