Seema Shrimali Staff asked 6 months ago
The marks obtained by 50 students of a class in class 8 of a school in subject mathematics paper consisting of 100 marks are presented in table below.
Find the mean of marks obtained by the students.
| Marks Obtained | Number of Students |
| 10 | 1 |
| 20 | 3 |
| 36 | 2 |
| 40 | 3 |
| 50 | 8 |
| 60 | 8 |
| 70 | 5 |
| 72 | 9 |
| 80 | 3 |
| 85 | 4 |
| 90 | 1 |
| 93 | 2 |
| 97 | 1 |
1 Answers
Education Desk Staff answered 6 months ago
| Marks Obtained (x) | Number of Students (f) | f x |
| 10 | 1 | 10 |
| 20 | 3 | 60 |
| 36 | 2 | 72 |
| 40 | 3 | 120 |
| 50 | 8 | 400 |
| 60 | 8 | 480 |
| 70 | 5 | 350 |
| 72 | 9 | 648 |
| 80 | 3 | 240 |
| 85 | 4 | 340 |
| 90 | 1 | 90 |
| 93 | 2 | 186 |
| 97 | 1 | 97 |
| Total : 50 | Total : 3093 |
Now,
Mean is the (sum of all fx) divide by (Total f) = 3093/60 = 61.86
Therefore, the mean marks obtained by the student is 61.86.
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