The Table Below Shows the Soft Drinks Preferences of People

Multiple Choice

The table below shows the soft drinks preferences of people in three age groups. $$\begin{array} { l c c c } & \text { Cola } & \text { Root Beer } & \text { Lemon-lime } \\\text { Under 21 years of age } & 40 & 25 & 20 \\\text { Between 21 and 40 } & 35 & 20 & 30 \\\text { Over 40 years of age } & 20 & 30 & 35\end{array}$$ If one of the 255 subjects is randomly selected, find the probability that the person drinks root beer given that they are over 40.

A) $\frac { 2 } { 5 }$
B) $\frac { 2 } { 17 }$
C) $\frac { 6 } { 17 }$
D) None are correct