Q:-5. The marks (Out of 100) obtained by a group of students in science test are 85, 76, 90, 85, 39, 48, 39, 95, 81, 75
Find
i) Range of the marks obtained
ii) Mean marks obtained
iii) Mode and Median of the data
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First we have to arrange the marks obtained by a group of students in a science test in an ascending order,
= 39, 48, 56, 75, 76, 81, 85, 85, 90, 95
(i) The highest marks obtained by the student = 95
The lowest marks obtained by the student = 39
(ii) We know that, Range = Highest marks – Lowest marks= 95 – 39
= 56
(iii) Mean of Marks = (Sum of all marks obtained by the group of students) / (Total number of marks)
= (39 + 48 + 56 + 75 + 76 + 81 + 85 + 85 + 90 + 95)/ 10
= 730/10
= 73
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