39 psychology students took a standardized test. The scores are summarized in the two tables below.

Classes Frequency Relative Frequency
180 - 199 15  
200 - 219 14  
220 - 239 10  

 

Classes Cumulative Frequency Cumulative Relative Frequency
180 - 199 15  
200 - 219    
220 - 239    

What are the missing values?