At the beginning of the school year, 50 percent of all students in Mr. Wells' math class answered "Yes" to the question "Do you love math", and 50% answered "No." At the end of the school year, 70% answered "Yes" and 30% "No." Altogether, x percent of the students gave a different answer at the beginning and end of the school year. What is the difference between the maximum and minimum possible values of x?
+137 The minimum possible value is 70 - 50 = 20%, and MAXIMUM is 30 + 50 = 80%
difference = |80 - 20| = 60
