в) 3/20 × 1 1/6 = 5/11 =

в) \(\frac{3}{20} \cdot 1\frac{1}{6} = \frac{3}{20} \cdot \frac{7}{6} = \frac{3 \cdot 7}{20 \cdot 6} = \frac{21}{120} = \frac{7}{40}\)

Ответ: 7/40