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[tex] \frac{5}{6} \times \frac{3}{5} + \frac{3}{10} \times \frac{3}{20} [/tex]
[tex] \frac{1}{6} + \frac{3}{10} \times \frac{3}{20} = \frac{1}{2} + \frac{3}{10} \times \frac{3}{20} = \frac{1}{2} + \frac{9}{200} [/tex]
[tex] \frac{100 + 9}{200} = \frac{109}{200} [/tex]
