Answer :
Tim - 3x
Marie - 6x
William - x
[tex]\frac{William}{Marie}=\frac{x}{6x}=\frac{1}{6} \Rightarrow 1:6[/tex]
Marie - 6x
William - x
[tex]\frac{William}{Marie}=\frac{x}{6x}=\frac{1}{6} \Rightarrow 1:6[/tex]