A bag contains 2 red marbles, 3 green marbles and 4 blue marbles. A marble is picked at random from the bag. What is the probability that the marble is not a blue marble ?

A

$$\frac{4}{9}$$

B

$$\frac{5}{9}$$

C

$$\frac{1}{9}$$

D

$$\frac{2}{9}$$