The following table shows the marks of the students in an examination. If the average of the data is 38.3, what is the value of x?
| marks | Number of students |
| 20 | 6 |
| 30 | x |
| 40 | 12 |
| 45 | 13 |
| 50 | 8 |
1
11
2
14
3
13
4
15
The following table shows the marks of the students in an examination. If the average of the data is 38.3, what is the value of x?
| marks | Number of students |
| 20 | 6 |
| 30 | x |
| 40 | 12 |
| 45 | 13 |
| 50 | 8 |