To find the answer I just added all of the dots after the three (amount of books read) and it is equal to 7. :D hope this helped :D
        
                    
             
        
        
        
Sorry but What information?
        
             
        
        
        
Answer:
set A and set B...it is the best and right option bro...option c is wrong because 2 elements of domain has relation with 1 range
 
        
             
        
        
        
-11-(-7)
-11+7
Your answer is -4