Draw a Venn diagram (circles) to represent the students taking art and music.
The circles will overlap. The circle for art contains 26 students.
The circle for music contains 18 students. Since 2 students take BOTH
art and music (place 2 in the area where the circles overlap), the remainder
of the art circle contains 24 students and the remainder of the music circle
contains 16 students. Adding all values (24 + 16 + 2) gives a total of 42
students. Of the class of 50 students, 8 do not take art or music.