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 children) |
40-50 50-60 60-70 70-80 80-90 |
What is the class interval in which the greatest frequency occurs?
Marks in class interval | Tally Marks | No.of children |
40 – 50 | IIII | 4 |
50 – 60 |
| 8 |
60 – 70 | III | 3 |
70 – 80 | III | 3 |
80 – 90 | II | 2 |
2