What is the value of P(B')?

Answer: ) Events A and B are such that: P(A) = 0.4; P(B) = 0.5; P(A n B) = 0.3; and P(A u B) = 0.6. i) What is the value of P(A u B')? (Where B' is the compliment of B.) 0.
Step-by-step explanation: I just did a little extra credit :D