Gilda has a bag of marbles. She gives $30 \textbackslash\%$ of them to her friend Pedro. Then Gilda gives $25 \textbackslash\%$ of what is left to another friend, Ebony. Finally, Gilda gives $10 \textbackslash\%$ of what is now left in the bag to her brother Jimmy. What percentage of her original bag of marbles does Gilda have left for herself? (adapted 2019 AMC 8, Question \#8) 
选项为:A:$$47.25\textbackslash\%$$  B:$50.25\textbackslash\%$  C:$$65\textbackslash\%$$  D:$$70\textbackslash\%$$  请回答其中一个选项.