Asurvey of 500 high school students was taken to determine their favorite chocolate candy. of the 500 students surveyed, 167 like snickers, 171 like twix, 139 like reese's peanut butter cups, 90 like snickers and twix, 75 like twix and reese's peanut butter cups, 108 like snickers and reese's peanut butter cups, and 47 like all three kinds of chocolate candy. how many students like reese's peanut butter cups or snickers, but not twix?