Ratio of pink marbles to white marbles is: [tex]1:5[/tex]
Let the number of pink marbles are denoted by [tex]p[/tex]
and the number of white marbles are denoted by [tex]w[/tex]
Then,
[tex]p:w::1:5[/tex]
i.e., [tex]\frac{p}{w}=\frac{1}{5}[/tex]
The percentage of pink marbles contain in bag is given by: [tex]( \frac{1}{6} ) \times 100[/tex]
[tex]=\frac{100}{6}[/tex]
[tex]=16.67\%[/tex]