The marks scored by 20 students in a test are given below:
54, 42, 68, 56, 62, 71, 78, 51, 72, 53, 44, 58, 47, 64, 41, 57, 89, 53, 84, 57.
Complete the following frequency table:
| (Marks in class intervals) |
Tally marks |
Frequency (No. of (Childrens) |
| 40 - 50 |
|
|
| 50 - 60 |
|
|
| 60 - 70 |
|
|
| 70 - 80 |
|
|
| 80 - 90 |
|
|
What is the class interval in which the greatest frequency occurs?
