Find the Probability of the Event If a Single Choice $\frac { 7 } { 25 }$

Find the probability of the event if a single choice is made from a bag.
-A bag contains 4 red marbles, 8 blue marbles, 7 yellow marbles, and 6 green marbles. What is the probability of choosing a yellow or green marble when one marble is drawn?

A) $\frac { 7 } { 25 }$
B) $\frac { 1 } { 2 }$
C) $\frac { 13 } { 25 }$
D) $\frac { 6 } { 25 }$