A sample of 40 11th graders were asked to select a favorite pattern out of 6 choices. The following display shows what their favorite color patterns were.
The counts have been recorded in the accompanying table according to
pattern and the number of students who selected that pattern. What is the
missing value in the table?
Color Pattern
Frequency
Blue on gray
4
Green
6
Pink polka dots
?
Purple
8
Red and orange
stripes
7
Yellow
3