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Question
Consider the following distribution:
| Marks obtained | Number of students |
| More than or equal to 0 | 63 |
| More than or equal to 10 | 58 |
| More than or equal to 20 | 55 |
| More than or equal to 30 | 51 |
| More than or equal to 40 | 48 |
| More than or equal to 50 | 42 |
The frequency of the class 30 – 40 is:
Options
3
4
48
51
Solution
3
Explanation:
| Marks obtained | Number of students |
| 0 – 10 | (63 – 58) = 5 |
| 10 – 20 | (58 – 55) = 3 |
| 20 – 30 | (55 – 51) = 4 |
| 30 – 40 | (51 – 48) = 3 |
| 40 – 50 | (48 – 42) = 6 |
| 50... | 42 = 42 |
Hence, frequency of the class interval 30 – 40 is 3.
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