Patrick gets $50 \textbackslash\%$ on a 10 -problem test, $30 \textbackslash\%$ on a 20 -problem test and $30 \textbackslash\%$ on a 30 -problem test. If the three tests are combined into one 60 problem test, which percent is closest to her overall score? (adapted from 2006 AMC 8, Question \#12) 
选项为:A:$$33$$  B:$$44$$  C:$$55$$  D:$$66$$  E:$$99$$  请回答其中一个选项.