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प्रश्न
In an examination, the grades achieved by 30 students of a class are given below. Arrange these grades in a table using tally marks:
B, C, C, E, A, C, B, B, D, D, D, D, B, C, C, C, A, C, B, E, A, D, C, B, E, C, B, E, C, D
योग
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उत्तर
On arranging the given data in a table using tally marks, as shown below table
| Grades | Tally marks | Number of students |
| A | `bb|bb|bb|` | 3 |
| B | `cancel(bb|bb|bb|bb|) bb|bb|` | 7 |
| C | `cancel(bb|bb|bb|bb|)` `cancel(bb|bb|bb|bb|)` | 10 |
| D | `cancel(bb|bb|bb|bb|) bb|` | 6 |
| E | `bb|bb|bb|bb|` | 4 |
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