question_answer

Let A and B be two events such that \[P\left( A \right)=0.3\] and \[P\left( A\cup B \right)=0.8\]. If A and B are independent events, then P(B)=

A)  \[\frac{5}{6}\]                         

B)  \[\frac{5}{7}\]

C)  \[\frac{3}{5}\]                         

D)  \[\frac{2}{5}\]

E)  None of these