A Dart Is Thrown Randomly and Sticks on the Circular $\frac{1}{8}$

Multiple Choice

A dart is thrown randomly and sticks on the circular dart board shown. Assume that all sectors are the same size and that the dart does not land on a border between shaded areas.

-Find the probability that the dart lands on sector number 3 or sector number 7.

A) $\frac{1}{8}$
B) $\frac{1}{5}$
C) $\frac{1}{4}$
D) $\frac{1}{2}$