If a and B Are Mutually Exclusive $P ( A ) = 0.2$

Multiple Choice

If A and B are mutually exclusive, $P ( A ) = 0.2$ , and $P ( B ) = 0.6$ , find $P ( A \cup B ) ^ { \prime }$ .

A) $P ( A \cup B ) ^ { \prime } = 0.2$
B) $P ( A \cup B ) ^ { \prime } = 0.88$
C) $P ( A \cup B ) ^ { \prime } = 0.92$
D) $P ( A \cup B ) ^ { \prime } = 0.12$
E) $P ( A \cup B ) ^ { \prime } = 0.38$