$X$ and $Y$ are two random independent events. It is known that $P(X)=0.40$ and $P\left(X \cup Y^{C}\right)=0.7$. Which one of the following is the value of $P(X \cup Y)$ ?
(A) 0.7
(B) 0.5
(C) 0.4
(D) 0.3
$X$ and $Y$ are two random independent events. It is known that $P(X)=0.40$ and $P\left(X \cup Y^{C}\right)=0.7$. Which one of the following is the value of $P(X \cup Y)$ ?
(A) 0.7
(B) 0.5
(C) 0.4
(D) 0.3