2) The first practice test of 80 marks for the students of standard tenth
was conducted for a class of 36 students. The marks obtained by the
students were as follows. Find the mean of the marks.
80, 70, 60, 50, 46, 40, 28, 30, 32, 40, 34, 74
40, 74, 72, 32, 60, 72, 74, 50, 50, 80, 78, 78
76, 32, 30, 34, 60, 78, 80, 32, 70, 74, 46, 32
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