Lumos StepUp High School Algebra 2 - Mathematics Practice test + Workbook Applying the Addition Rule and Interpreting Answers

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Suppose the probability that event A occurs is $$\frac{2}{3}$$ , the probability that event B occurs is $$\frac{2}{5}$$ , and the probability that both events A and B occur is $$\frac{7}{15}$$. What is the probability that event A occurs or that event B occurs? Enter your answer as a simplified fraction.

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