7,6 : (2/5 : 10/19)

\(7,6=\frac{38}{5}\).

\(\frac{2}{5}:\frac{10}{19}=\frac{2}{5}\cdot\frac{19}{10}=\frac{19}{25}\).

\(\frac{38}{5}:\frac{19}{25}=\frac{38}{5}\cdot\frac{25}{19}=10\).

Ответ: 10