\[\boxed{\mathbf{557\ (557).}\mathbf{\ }Еуроки\ - \ ДЗ\ без\ мороки}\]
\[1)\ \frac{5}{16}\ :1,25 \cdot 0,36\ :1\frac{4}{5} =\]
\[= \frac{5}{16}\ :\frac{125}{100} \cdot \frac{36}{100}\ :\frac{9}{5} =\]
\[= \frac{5}{16} \cdot \frac{100}{25} \cdot \frac{36}{100} \cdot \frac{5}{9} =\]
\[2)\ \frac{7}{8}\ :\left( 0,75 \cdot \frac{14}{15}\ :1,2 \right) =\]
\[= \frac{7}{8}\ :\left( \frac{75}{100} \cdot \frac{14}{15}\ :\frac{12}{10} \right) =\]
\[= \frac{7}{8}\ :\left( \frac{75}{100} \cdot \frac{14}{15} \cdot \frac{10}{12} \right) =\]
\[\boxed{\mathbf{557.}\mathbf{\ }}\]
\[= (740 + 660 + 940)\ :6 =\]
\[= (1400 + 940)\ :6 =\]
\[= 2340\ :6 = 390\ (человек) - в\ \]
\[день\ в\ среднем\ было\ в\ музее.\]
\[Ответ:390\ человек.\]