\[Страница\ 13.\]
\[\boxed{\mathbf{3.}}\]
\[1 - все\ деревья;\]
\[\frac{1}{3} = \frac{2}{6}\ часть - занимают\ \]
\[яблони;\]
\[1 - \frac{2}{6} - \frac{1}{6} = 1 - \frac{3}{6} = \frac{3}{6} =\]
\[= \frac{1}{2}\ (часть) - занимают\ \]
\[вишни.\]
\[360{^\circ} - круговая\ диаграмма:\]
\[360\ :2 = 180{^\circ} - вишни;\]
\[360\ :3 = 120{^\circ} - яблони;\]
\[360\ :6 = 60{^\circ} - груши.\]
\[\boxed{\mathbf{4.}}\]
\[100 - 80 = 20\% - отруби.\]
\[\frac{80}{100} = \frac{4}{5}\ (часть) - мука.\]
\[360 \cdot \frac{4}{5} = 4 \cdot 72 = 288{^\circ}.\]
\[\frac{20}{100} = \frac{1}{5}\ (часть) - отруби.\]
\[360 \cdot \frac{1}{5} = 72{^\circ}.\]
\[\boxed{\mathbf{5.}}\]
\[100 - (25 + 55) = 100 - 80 =\]
\[= 20\% - дети.\]