Balls Numbered from 1 to 38 Are Placed in a Container

Multiple Choice

Balls numbered from 1 to 38 are placed in a container and stirred. If one is drawn at random, what is the probability that the number is a prime number?

A) $\frac { 6 } { 19 }$
B) $\frac { 9 } { 19 }$
C) $\frac { 20 } { 38 }$
D) $\frac { 13 } { 38 }$