A Dart Is Thrown Randomly and Sticks on the Circular $\frac{9}{10}$

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 does not land on the sector numbered 3.

A) $\frac{9}{10}$
B) $\frac{7}{8}$
C) $\frac{1}{8}$
D) $\frac{3}{4}$