GCSE Maths Practice: tree-diagrams

\( \begin{array}{l}\textbf{Box: 3R,4G,2B. Draw 2 marbles.} \\ \text{Find probability red then green.}\end{array} \)

Choose one option:

\( \frac{12}{72} \) \( \frac{3}{18} \) \( \frac{6}{72} \)