[tex]\begin{gathered} There\text{ are 6 red, 5 white, 3 blue, and 4 gr}en\text{ marble}. \\ A\text{ }b\text{lue marble was already selected, } \\ So,\text{ remaning marble in the bag is,} \\ \text{6 red, 5 white, 2 blue, and 4 gr}en\text{ marble}. \\ So,\text{ the proability of selecting one red marble is,} \\ \Rightarrow\frac{6_{C1}}{17_{C1}}=\frac{6}{17}=0.3529 \end{gathered}[/tex]