Q: Which of the following statements about using ratios and averages in exam marks analysis are correct?
(A) If two candidatesβ marks are in the ratio 3:4 and both are out of the same maximum marks, the candidate with ratio part 4 has higher marks;
(B) If the average marks of two groups are known, the overall average can always be found by taking the simple average of the two group averages, regardless of group sizes;
(C) When group sizes differ, the overall average must be obtained as a weighted average using the respective group sizes as weights;
(D) Expressing marks as percentages allows fair comparison of students even when maximum marks of different exams differ;
(E) When totals are different, comparing ratios or percentages is more informative than comparing raw marks alone;
Choose the correct answer from the options given below:

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