Answer: 41%
Step-by-step explanation:
15 girls prefer biology. 
Find the boys who prefer biology;
There are 36 girls in total so;
= 100 - 36
= 64 boys interviewed 
14 boys prefer Physics
= 64 - 14
= 50 boys prefer Biology and Chemistry
7 out of the 31 who prefer chemistry are girls so the boys who prefer chemistry are;
= 31 - 7 
= 24 boys 
Boys who prefer Biology;
= 50 - 24
= 26 boys 
Total who prefer biology;
= 15 girls + 26 boys
= 41 students 
Percentage = 41/100 = 41%
 
        
             
        
        
        
5x times itself
5x*5x=25x^2
^ means the little square root on the top 
        
             
        
        
        
Answer: A
Step-by-step explanation:
 
        
                    
             
        
        
        
Answer:
20,038
Step-by-step explanation:
20,320 - 282