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:

1) Highest and the lowest marks obtained by the students.

2) Range of the marks obtained.

3) Mean marks obtained by the group.

Answer 1

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

1) Highest marks = 95

Lowest marks = 39

2) Range = 95 − 39

= 56

3) Mean marks = `(85+ 76+90+85+39+48+56+95+81+75 )/10`

= `730/10 = 73`