Question

The marks (out of 100) obtained by a group of students in a science test are 85, 76, 90, 85, 39, 48, 56, 95, 81 and 75. Find the:
(i) Highest and the lowest marks obtained by the students.
(ii) Range of the marks obtained.
(iii) Mean marks obtained by the group.

Answer 1

The marks obtained by the group of students in a science test can be arranged in ascending order as follows. 39, 48, 56, 75, 76, 81, 85, 85, 90, 95
(i) Highest marks = 95
Lowest marks = 39
(ii) Range = 95 - 39 = 56
(iii) Mean marks = $\frac{(85 + 76 + 90 + 85 + 39 + 48 + 56 + 95 + 81 + 75) }{10}$ = $\frac{730}{10}$ = 73