Answer:
12.5%
Step-by-step explanation:
what I done was subtract 120 from 144 which will leave 24 then I find the percentage.
This makes it 3/24. When you divide the fraction out, you get 0.125. To turn that into a percentage, you simply multiply by 100. 0.125*100=12.5% you can check this by taking 12.5% of 24, which will give you an answer of 3
 
        
                    
             
        
        
        
Step-by-step explanation:
10. 12
11. 500
12.8
13.45
 
        
                    
             
        
        
        
Answer = 14/8 
Step by step explanation 
2 x 7/8 
= (2x7)/8 
= 14/8
        
             
        
        
        
Answer:
Mean: 30 students
Standard deviation: 5.2 students
Step-by-step explanation:
Khan