Question

There are 15 students on a prom committee and 20 students on a yearbook community. If 10 students are on both committees, how many students are on only one committee?

Answer 1

25 students are on only one committee

Answer 2

15 students on prom
20 students on yearbook
10 in both

15 + 20 - 10 = 35
25 students are only in one committee.