128.309728
add all numbers together and divide by 50(there are 50 numbers)
find the difference of each number and 67.92(the mean)
add all these numbers together and divide by 50
 
        
             
        
        
        
Answer:
total amount paid = $ 22.9
Step-by-step explanation:
total price = $ 2.5 + $3.4(6)= $22.9
 
        
                    
             
        
        
        
we know that
step 1
multiply  by
 by 
so

step 2
Divide numerator and denominator by 

therefore
the answer is

 
        
                    
             
        
        
        
 La respuesta es el número 4