On average, each student has $$14$$ balls. Each of the $$15$$ girls has $$24$$ balls on average. There are $$25$$ boys, and their average number of balls is~\uline{~~~~~~~~~~}~. 
选项为:A:$$6$$  B:$$7$$  C:$$8$$  D:$$9$$  E:$$10$$  请回答其中一个选项.