Miss Molly surveyed her class of 30 students about their favorite color. Half of the class answered green, one-third of the girls answered pink, and the rest of the class answered yellow. If there are 18 girls in the class, how many students like yellow best?
30/2 = <T>divide(30, 2)=15.0 students answered green.
18/3 = <T>divide(18, 3)=6.0 girls answered pink.
So, 15 + 6 = <T>add(15, 6)=21 students answered either green or pink.
Therefore, 30 - 21 = <T>subtract(30, 21)=9 answered yellow.
