In a french club, these are the numbers of the students: => 10 freshman =>12 sophomores =>15 juniors => 30 seniors in the club. Then the adviser needs to select 1 to act as guide for the coming visitor. To know the answer, let's solve the average.. => 10 + 12 +15 + <span>30 = 67 students </span>=> 67 / 4 = 16.75 OR <span>=> 15/67</span>