In a Fish Tank, There Are 15 Goldfish, 6 Angelfish $\frac { 11 } { 13 }$

Multiple Choice

In a fish tank, there are 15 goldfish, 6 angelfish, and 18 guppies. If a fish is selected at random, find the probability that it is an angelfish or a guppy.

A) $\frac { 11 } { 13 }$
B) $\frac { 8 } { 13 }$
C) $\frac { 7 } { 13 }$
D) $\frac { 5 } { 13 }$