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 ) 
选项为:A:$$25$$  B:$$35$$  C:$$40$$  D:$$45$$  E:$$50$$  请回答其中一个选项.