Given:
There are 16 blue bikes and 8 tan bikes in your dad's bike shop.
So, the total bikes = 16 + 8 = 24 bikes
We will find the probability that choosing a blue bike:
[tex]\begin{gathered} probability=\frac{number\text{ }of\text{ }blue\text{ }bikes}{total\text{ }bikes} \\ \\ probability=\frac{16}{24}=\frac{2}{3} \end{gathered}[/tex]So, the answer will be: probability = 2/3