Question 772718
   

  let pure alcohol 100% 
  and  quarts=x

    x*100%+10*10%=25%(x+10)
     

      after solving
  


      x=2 quarts 


 by allegation and mixture 

  let pure alcohol be 100%


    10%        100%



       25% 



100-25=75  and 25-10=15



ratio=75:15=5:1


    5:1::10:x


      x=2