2 .
Mrs Mahlangu writes down the marks for the English test that the students in her class
their first class test and wants to work out the different statistics for the test. She asks y
help her. Below are the marks that the 31 students scored:
87
74
76
21
65
29
63
58
54
19
13
56
52
69
66
4
72
34
42
52
67
48
50
63
58
81
61
a)
Determine the mean mark.​