5 The Venn diagram illustrates the occurrence of two events \(A\) and \(B\).
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You are given that \(\mathrm { P } ( A \cap B ) = 0.3\) and that the probability that neither \(A\) nor \(B\) occurs is 0.1 . You are also given that \(\mathrm { P } ( A ) = 2 \mathrm { P } ( B )\).
Find \(\mathrm { P } ( B )\).