Suppose that the mean score of a class of 30 students was 78. The 19 male students in the class had a mean score of 68. What was the mean score for the 11 female students?
19/30 students got 68%. 11/30 students got ___%. What percentage does that blank have to be so that the average of the two percentages are 78%. keep in mind one percentage is weighed heavier because 19/30 is larger than 11/30