The marks obtained by 40 students of class X of a certain school in Science paper consisting of 10 marks are presented in the table below. Find the mean marks obtained by the students.
Marks obtained(xi) |
5 |
6 |
7 |
8 |
9 |
Number of students (fi) |
4 |
8 |
14 |
11 |
3 |
Marks Obtained (xi) |
Number of students (fi) |
fixi |
5 |
4 |
20 |
6 |
8 |
48 |
7 |
14 |
98 |
8 |
11 |
88 |
9 |
3 |
27 |
Σfi = 40 |
Σfixi = 281 |