Annville Junior High School has a math club and a science club. There are $3$ students in the math club and $3$ students who are members of both clubs. There are twice as many students in the science club as in the math club. Find the total number of students who are in the math club or the science club but not both.
There are 6 students in the science club, and 3 students are a member of both clubs.
The number to students that are members of only the math club is 3-3 = 0
The number of students thare are members of only the science club is 6 - 3 = 3.
There are a total of 3 students who are in the math or science club but not both.