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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:
- Highest and the lowest marks obtained by the students.
- Range of the marks obtained.
- Mean marks obtained by the group.
Solution
The marks obtained by the group of students in a science test can be arranged in an 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 = `(85+ 76+90+85+39+48+56+95+81+75 )/10`
= `730/10`
= 73
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