4 conditional probability motivating example notes in

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Unformatted text preview: bability Motivating Example Notes In a certain population, the probability a person lives to be 80 is 80% while the probability a person lives to be 90 is 68%. Given that a person lives to be 80, what is the probability that she/he will live to be 90? Conditional Probability Solution. General Multiplication Rule Event A: a person lives to be 90 Event B : a person lives to be 80 P(A∩B ) P(B ) = P(a person lives to be 80 AND a person lives to be 90) P(a person lives to be 80) P(a person lives to be 90) 0.68 P(a person lives to be 80) = 0.80 = 0.85 P(A|B ) = =...
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