Since $30 \textbackslash\%$ of the original 30 liters of paint was yellow, and 5 liters of yellow paint were added to make the new mixture, there are $9+5=14$ liters of yellow tint in the new mixture. Since only 5 liters of paint were added to the original 30 , there are a total of 35 liters of paint in the new mixture. This gives $40 \textbackslash\%$ of yellow tint in the new mixture, which is (C) 40 . 
A mixture of 30 liters of paint is $25 \textbackslash\%$ red tint, $30 \textbackslash\%$ yellow tint and $45 \textbackslash\%$ water. Five liters of yellow tint are added to the original mixture. What is the percent of yellow tint in the new mixture? (2007 AMC 8, Question \#17 ) 
Options:
a: $$25$$ 
b: $$35$$ 
c: $$40$$ 
d: $$45$$ 
e: $$50$$ 