The six faces of a cube (die) are numbered as $1,2,3,4,5$ and $6$, and it is rolled once. An outcome is the observed number on the top face. If the probability of getting an odd number as an outcome is twice that of an even number, then the probability of getting a number less than $3$ is
- $\frac{1}{9}$
- $\frac{2}{9}$
- $\frac{1}{3}$
- $\frac{4}{9}$