The weights of their backpacks would be discrete
        
             
        
        
        
Answer:

Step-by-step explanation:
we would like to solve the following equation:

in order to do so do cross multiplication:

divide both sides by √3:

since we ended up with a square root on the denominator so we can consider rationalising the denominator to do so multiply both numerator and denominator by √3 which yields:

simplify multiplication:

reduce fraction:

and we are done!
 
        
             
        
        
        
1200/200 in a simplified form is
3/5