\[ \frac{17}{5} + \frac{3}{6} = \frac{17 \times 6}{5 \times 6} + \frac{3 \times 5}{6 \times 5} = \frac{102}{30} + \frac{15}{30} = \frac{117}{30} \]
\[ \frac{117}{30} : \frac{3}{10} = \frac{117}{30} \times \frac{10}{3} \]
\[ \frac{117}{30} \times \frac{10}{3} = \frac{117}{3} \times \frac{1}{30} = 39 \times \frac{1}{30} \]
\[ \frac{117}{30} \times \frac{10}{3} = \frac{1170}{90} = 13 \]
Ответ: 13