To draw a histogram to represent the following frequency distribution:
 
Class interval \(5 - 10\) \(10 - 15\) \(15 - 25\) \(25 - 45\) \(45 - 75\)
Frequency \(6\) \(12\) \(10\) \(8\) \(15\)
 
The adjusted frequency for the class \(25 - 45\) is: