The marks scored by 40 students of class IX in mathematics are given below:
81, 56, 68, 79, 85, 13, 29, 68, 54, 73, 47, 35, 72, 64, 95, 44, 50, 77, 64, 35, 79, 52, 45, 54, 70, 83, 62, 64, 72, 92, 84, 76, 63, 43, 54, 38, 73, 68, 52, 54.
Prepare a frequency distribution with class size of 10 marks.
Marks | Tally marks | Frequency |
20-30 | I | 1 |
30-40 | III | 4 |
40-50 |
| 5 |
50-60 |
| 7 |
60-70 |
| 7 |
70-80 |
| 8 |
80-90 | IIII | 4 |
90-100 | II | 2 |
Total = 40 |