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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
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