е) 4/9·5/8 + 5/8·3/5

\( \frac{4}{9} \cdot \frac{5}{8} + \frac{5}{8} \cdot \frac{3}{5} = \frac{20}{72} + \frac{15}{72} = \frac{35}{72} \approx 0,49 \)