Assume that the events A and B satisfy P(A)=P(B)=P(B/A')=1/3 where A' is complement of A. What is P(A'UB)?

Question

Assume that the events A and B satisfy P(A)=P(B)=P(B/A')=1/3 where A' is complement of A. What is P(A'UB)?

Answer 1

P(A'UB)=2/3

P(A)=P(B)=1/3

A'=2/3

Therefore the probability of P(A'UB) will be 2/3

Hence P(A')=2/3

P(A'UB)=2/3