Question 2 - Past Exam Question 24 students in Year 9 each sat national tests in Mathematics and English. The back-to-back stem-and-leaf diagram shows their results. Key 5 1 9 represents marks of 15 in Mathematics and 19 in English English Mathematics O CO 8 6 5 N N 3 5 6 8 8 9 O CO 6 W N 5 6 7 N 9 2 W - 3 7 O 2 9 A 8 8 4 O 1 (a) The national average mark for the Mathematics test was 33 Work out the percentage of these students who scored more than the national average in Mathematics. [2 marks] 1 (b) The national average mark for the English test was 27 How do the English results of these students compare with the national average? Show working to support your answer. [2 marks]