Using the addition rule for probability, if P(A) = 0.5, P(B) = 0.4, and P(A and B) = 0.2, what is P(A or B)?

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Multiple Choice

Using the addition rule for probability, if P(A) = 0.5, P(B) = 0.4, and P(A and B) = 0.2, what is P(A or B)?

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