1 .
Let $A$ and $B$ be two independent events in some sample space $S$. Recall that $\overline{B}$
denotes the complement of $B$. You are given that $\Pr(A) = 1/4$ and $\Pr(\overline{B}) = 2/3$.
What is $\Pr(A \cup B)$?
(a)
1/2
(b)
2/3
(c)
1/3
(d)
3/4