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Question
In a Mathematics test, the following marks were obtained by 40 students. Arrange these marks in a table using tally marks.
| 8 | 1 | 3 | 7 | 6 | 5 | 5 | 4 | 4 | 2 |
| 4 | 9 | 5 | 3 | 7 | 1 | 6 | 5 | 2 | 7 |
| 7 | 3 | 8 | 4 | 2 | 8 | 9 | 5 | 8 | 6 |
| 7 | 4 | 5 | 6 | 9 | 6 | 4 | 4 | 6 | 6 |
Find how many students obtained marks equal to or more than 7.
Sum
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Solution
| Marks | Tally Marks | Number of Students |
| 1 | || | 2 |
| 2 | ||| | 3 |
| 3 | ||| | 3 |
| 4 | `\cancel(||||)` || | 7 |
| 5 | `\cancel(||||)` | | 6 |
| 6 | `\cancel(||||)`|| | 7 |
| 7 | `\cancel(||||)` | 5 |
| 8 | |||| | 4 |
| 9 | ||| | 3 |
The students who got marks equal to or more than 7 are the students who got either 7, 8 or 9 marks.
Therefore, the number of these students
= 5 + 4 + 3
= 12
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