A florist had 30 stalks of red roses. He sold \[\frac{1}{3}\] of them in the morning and\[\frac{1}{2}\] of them in the evening. What fraction of red roses are left with him?

• A.  \[\frac{1}{4}\]           
• B.                \[\frac{1}{3}\]                       
• C.  \[\frac{1}{5}\]                       
• D.    \[\frac{1}{6}\]