suppose that 30% of the female students and 40% of the male students in a college history class are from a major city. if there are 50 female students and 30 male
students in the class, then of the female students and of the male student are from a major city of the 80 students in the class in total, 7% are from
a major city. the percentage of students from a major city is not equal to the average of 30% and 40%, which is 35%, because the number of female and male students
in the class