1) A painter mixes blue paint with white paint so that the mixture contains 10% blue paint.In a mixture of 40 litres paint, how many litres of blue paintshould be added, so that the mixture contains 20% of blue paint? A) 2.5 litres B) 4 litres C) 5 litres D) 2 litres Answer: Option CExplanation:Quantity of blue paint in the mixture=10% of 40 Quality of white=40-4=36 litres Let x litres blue paint can be mixed Then,$\frac{4+3}{36}=\frac{20}{80}$ $x=5 litres$
