Answer:
 option A
Step-by-step explanation:
given,
 10% A grades     80% B grades      10% C grades
This year, managers with scores less than 35 received C's and those with scores above 425 received A's. 
The mean has to be middle of two corresponding cutoff value
               
                       μ = 230
Cutoff Off C grade corresponds with the area of 0.10 is table A.
corresponding z- score according to Table A 
            Z = -1.28
now, standard deviation 
     
     
     
        σ = 152.3
Correct answer is option A
 
        
             
        
        
        
Answer: 
Each book costs $27.
Step-by-step explanation:
Subtract 254 - 11.
254 - 11 = 243
Now, divide 243 by 9.
243 ÷ 9 = 27
Hope this helped! 
 
        
                    
             
        
        
        
The ANWSER is B hope this helps
        
             
        
        
        
Answer:
Whats the question
Step-by-step explanation:
 
        
             
        
        
        
ooh nice answer bud Answer:
Step-by-step explanation:
Answer:
Step-by-step explanation: