Find the Probability $\frac { 1 } { 2 }$ B) $\frac { 2 } { 9 }$

Multiple Choice

Find the probability.
-A bag contains 7 red marbles, 2 blue marbles, and 9 green marbles. What is the probability of Choosing a blue marble?

A) $\frac { 1 } { 2 }$
B) $\frac { 2 } { 9 }$
C) $\frac { 1 } { 9 }$
D) $\frac { 7 } { 18 }$