[tex]\begin{gathered} green=7 \\ \text{yellow}=4 \\ \text{Total}=7+4 \\ \text{Total}=11 \\ a) \\ \text{First yellow} \\ P=\frac{4}{11} \\ \text{Second gre}en \\ 11-1=10 \\ P=\frac{7}{10} \\ b)\text{ } \\ \text{First yellow} \\ P=\frac{4}{11} \\ \text{Second gre}en \\ P=\frac{7}{11} \end{gathered}[/tex]