The accompanying venn diagram shows three events A,B and C,and also the probabilities of the various intersections (for instance $P(A \cap B)=0.07$).Determine $P(A\cup B)$

Question

$\begin{array}{1 1}(A)\;0.45\\(B)\;0.35\\(C)\;0.75\\(D)\;0.50\end{array} $