Simple you take total number of student who are responded the question ie take 10 from uppper + 5 from lower who respoded correct + 5 who responded wrong but remember they are in lower group
@@francheskamaecarandang7332 the students are ranked according to scores...Analysis is mainly concerned with students who performed exceptionally and those who performed poorly. The upper group is the set of students who performed exceptionally. Lower group performed poorly.
