Two events A and B are mutually exclusive if: O A = {a subject has a flu} and B = {a subject is male} O They are independent. P(ANB) = 1.0 A = {a subject has a body mass index over 25} and B = {a subject has a body mass index below 15} O A = {a subject weight is over 100} and B = {a subject weight is below 120}

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